[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fa-gM_H5MfpIaBNNrRpM-YN90LhtMp3Sm0f8sMA7BRxM":3},{"article":4,"iocs":46},{"id":5,"title":6,"slug":7,"summary":8,"ai_summary":9,"brief":10,"full_text":11,"url":12,"image_url":13,"published_at":14,"ingested_at":15,"relevance_score":16,"entities":17,"category_id":24,"category":25,"article_tags":28},"4c0e0b29-ea45-4196-8c16-e9cd2d541475","Rockwell Automation RSLinx Classic","rockwell-automation-rslinx-classic-5904eb","View CSAF Summary Successful exploitation of these vulnerabilities could allow an attacker to cause a denial-of-service condition on the affected product. The following versions of Rockwell Automation RSLinx Classic are affected: RSLinx Classic \u003C=4.50 (CVE-2026-9621, CVE-2026-9622, CVE-2026-9624, CVE-2026-9625) CVSS Vendor Equipment Vulnerabilities v3 8.6 Rockwell Automation Rockwell Automation RSLinx Classic Integer Overflow or Wraparound, Integer Underflow (Wrap or Wraparound), Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') Background Critical Infrastructure Sectors: Critical Manufacturing Countries\u002FAreas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2026-9621 A denial-of-service security issue exists within RSLinx Classic. The security issue stems from improper handling of a malformed packet. A crafted CIP packet can cause the RSLinx Classic service to crash, requiring a restart of the service to recover. View CVE Details Affected Products Rockwell Automation RSLinx Classic Vendor: Rockwell Automation Product Version: Rockwell Automation RSLinx Classic: \u003C=4.50 Product Status: known_affected Remediations Vendor fix Rockwell Automation has corrected the vulnerabilities in RSLinx Classic version 4.60. Mitigation Users using the affected software, who are not able to upgrade to one of the corrected versions, should use Rockwell Automation's security best practices https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight. https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight Mitigation For more information, see Rockwell Automation Security Advisories: https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html. https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html Relevant CWE: CWE-190 Integer Overflow or Wraparound Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.6 HIGH CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:C\u002FC:N\u002FI:N\u002FA:H 4.0 9.2 CRITICAL CVSS:4.0\u002FAV:N\u002FAC:L\u002FAT:N\u002FPR:N\u002FUI:N\u002FVC:N\u002FVI:N\u002FVA:H\u002FSC:N\u002FSI:N\u002FSA:H CVE-2026-9622 A denial-of-service security issue exists within RSLinx Classic. A crafted CIP packet targeting the Forward Close service can cause the RSLinx Classic service to crash, requiring a restart of the service to recover. View CVE Details Affected Products Rockwell Automation RSLinx Classic Vendor: Rockwell Automation Product Version: Rockwell Automation RSLinx Classic: \u003C=4.50 Product Status: known_affected Remediations Vendor fix Rockwell Automation has corrected the vulnerabilities in RSLinx Classic version 4.60. Mitigation Users using the affected software, who are not able to upgrade to one of the corrected versions, should use Rockwell Automation's security best practices https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight. https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight Mitigation For more information, see Rockwell Automation Security Advisories: https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html. https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html Relevant CWE: CWE-191 Integer Underflow (Wrap or Wraparound) Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.6 HIGH CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:C\u002FC:N\u002FI:N\u002FA:H 4.0 9.2 CRITICAL CVSS:4.0\u002FAV:N\u002FAC:L\u002FAT:N\u002FPR:N\u002FUI:N\u002FVC:N\u002FVI:N\u002FVA:H\u002FSC:N\u002FSI:N\u002FSA:H CVE-2026-9624 A denial-of-service security issue exists within RSLinx Classic. A crafted CIP packet can cause the RSLinx Classic service to crash due to insufficient data length validation, requiring a restart of the service to recover. View CVE Details Affected Products Rockwell Automation RSLinx Classic Vendor: Rockwell Automation Product Version: Rockwell Automation RSLinx Classic: \u003C=4.50 Product Status: known_affected Remediations Vendor fix Rockwell Automation has corrected the vulnerabilities in RSLinx Classic version 4.60. Mitigation Users using the affected software, who are not able to upgrade to one of the corrected versions, should use Rockwell Automation's security best practices https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight. https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight Mitigation For more information, see Rockwell Automation Security Advisories: https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html. https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html Relevant CWE: CWE-191 Integer Underflow (Wrap or Wraparound) Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.5 HIGH CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H 4.0 8.7 HIGH CVSS:4.0\u002FAV:N\u002FAC:L\u002FAT:N\u002FPR:N\u002FUI:N\u002FVC:N\u002FVI:N\u002FVA:H\u002FSC:N\u002FSI:N\u002FSA:N CVE-2026-9625 A denial-of-service security issue exists within RSLinx Classic. A crafted CIP packet with an oversized embedded message request can cause the RSLinx Classic service to crash, requiring a restart of the service to recover. View CVE Details Affected Products Rockwell Automation RSLinx Classic Vendor: Rockwell Automation Product Version: Rockwell Automation RSLinx Classic: \u003C=4.50 Product Status: known_affected Remediations Vendor fix Rockwell Automation has corrected the vulnerabilities in RSLinx Classic version 4.60. Mitigation Users using the affected software, who are not able to upgrade to one of the corrected versions, should use Rockwell Automation's security best practices https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight. https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight Mitigation For more information, see Rockwell Automation Security Advisories: https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html. https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html Relevant CWE: CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.5 HIGH CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H 4.0 8.7 HIGH CVSS:4.0\u002FAV:N\u002FAC:L\u002FAT:N\u002FPR:N\u002FUI:N\u002FVC:N\u002FVI:N\u002FVA:H\u002FSC:N\u002FSI:N\u002FSA:N Acknowledgments Rockwell Automation reported these vulnerabilities to CISA Legal Notice and Terms of Use This product is provided subject to this Notification (https:\u002F\u002Fwww.cisa.gov\u002Fnotification) and this Privacy & Use policy (https:\u002F\u002Fwww.cisa.gov\u002Fprivacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Minimize network exposure for all control system devices and\u002For systems, ensuring they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov\u002Fics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov\u002Fics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. CISA also recommends users take the following measures to protect themselves from social engineering attacks: Do not click web links or open attachments in unsolicited email messages. Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time. Revision History Initial Release Date: 2026-09-01 Date Revision Summary 2026-09-01 1 Initial Republication of Rockwell Automation Advisory Legal Notice and Terms of Use","Rockwell Automation has released a fix for multiple denial-of-service vulnerabilities in its RSLinx Classic software, affecting versions 4.50 and earlier. Exploitation of these flaws, stemming from improper handling of crafted CIP packets, could lead to service crashes and require restarts. The vulnerabilities have been assigned CVE identifiers CVE-2026-9621, CVE-2026-9622, CVE-2026-9624, and CVE-2026-9625, with CVSS scores indicating high severity.","Rockwell Automation RSLinx Classic vulnerable to DoS via malformed packets.","ICS Advisory Rockwell Automation RSLinx Classic Release DateSeptember 01, 2026 Alert CodeICSA-26-244-01 Related topics: Industrial Control System Vulnerabilities , Industrial Control Systems View CSAF Summary Successful exploitation of these vulnerabilities could allow an attacker to cause a denial-of-service condition on the affected product. The following versions of Rockwell Automation RSLinx Classic are affected: RSLinx Classic \u003C=4.50 (CVE-2026-9621, CVE-2026-9622, CVE-2026-9624, CVE-2026-9625) CVSS Vendor Equipment Vulnerabilities v3 8.6 Rockwell Automation Rockwell Automation RSLinx Classic Integer Overflow or Wraparound, Integer Underflow (Wrap or Wraparound), Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') Background Critical Infrastructure Sectors: Critical Manufacturing Countries\u002FAreas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2026-9621 A denial-of-service security issue exists within RSLinx Classic. The security issue stems from improper handling of a malformed packet. A crafted CIP packet can cause the RSLinx Classic service to crash, requiring a restart of the service to recover. View CVE Details Affected Products Rockwell Automation RSLinx Classic Vendor:Rockwell Automation Product Version:Rockwell Automation RSLinx Classic: \u003C=4.50 Product Status:known_affected Remediations Vendor fixRockwell Automation has corrected the vulnerabilities in RSLinx Classic version 4.60. MitigationUsers using the affected software, who are not able to upgrade to one of the corrected versions, should use Rockwell Automation's security best practices https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight.https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight MitigationFor more information, see Rockwell Automation Security Advisories: https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html.https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html Relevant CWE: CWE-190 Integer Overflow or Wraparound Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.6 HIGH CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:C\u002FC:N\u002FI:N\u002FA:H 4.0 9.2 CRITICAL CVSS:4.0\u002FAV:N\u002FAC:L\u002FAT:N\u002FPR:N\u002FUI:N\u002FVC:N\u002FVI:N\u002FVA:H\u002FSC:N\u002FSI:N\u002FSA:H CVE-2026-9622 A denial-of-service security issue exists within RSLinx Classic. A crafted CIP packet targeting the Forward Close service can cause the RSLinx Classic service to crash, requiring a restart of the service to recover. View CVE Details Affected Products Rockwell Automation RSLinx Classic Vendor:Rockwell Automation Product Version:Rockwell Automation RSLinx Classic: \u003C=4.50 Product Status:known_affected Remediations Vendor fixRockwell Automation has corrected the vulnerabilities in RSLinx Classic version 4.60. MitigationUsers using the affected software, who are not able to upgrade to one of the corrected versions, should use Rockwell Automation's security best practices https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight.https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight MitigationFor more information, see Rockwell Automation Security Advisories: https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html.https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html Relevant CWE: CWE-191 Integer Underflow (Wrap or Wraparound) Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.6 HIGH CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:C\u002FC:N\u002FI:N\u002FA:H 4.0 9.2 CRITICAL CVSS:4.0\u002FAV:N\u002FAC:L\u002FAT:N\u002FPR:N\u002FUI:N\u002FVC:N\u002FVI:N\u002FVA:H\u002FSC:N\u002FSI:N\u002FSA:H CVE-2026-9624 A denial-of-service security issue exists within RSLinx Classic. A crafted CIP packet can cause the RSLinx Classic service to crash due to insufficient data length validation, requiring a restart of the service to recover. View CVE Details Affected Products Rockwell Automation RSLinx Classic Vendor:Rockwell Automation Product Version:Rockwell Automation RSLinx Classic: \u003C=4.50 Product Status:known_affected Remediations Vendor fixRockwell Automation has corrected the vulnerabilities in RSLinx Classic version 4.60. MitigationUsers using the affected software, who are not able to upgrade to one of the corrected versions, should use Rockwell Automation's security best practices https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight.https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight MitigationFor more information, see Rockwell Automation Security Advisories: https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html.https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html Relevant CWE: CWE-191 Integer Underflow (Wrap or Wraparound) Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.5 HIGH CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H 4.0 8.7 HIGH CVSS:4.0\u002FAV:N\u002FAC:L\u002FAT:N\u002FPR:N\u002FUI:N\u002FVC:N\u002FVI:N\u002FVA:H\u002FSC:N\u002FSI:N\u002FSA:N CVE-2026-9625 A denial-of-service security issue exists within RSLinx Classic. A crafted CIP packet with an oversized embedded message request can cause the RSLinx Classic service to crash, requiring a restart of the service to recover. View CVE Details Affected Products Rockwell Automation RSLinx Classic Vendor:Rockwell Automation Product Version:Rockwell Automation RSLinx Classic: \u003C=4.50 Product Status:known_affected Remediations Vendor fixRockwell Automation has corrected the vulnerabilities in RSLinx Classic version 4.60. MitigationUsers using the affected software, who are not able to upgrade to one of the corrected versions, should use Rockwell Automation's security best practices https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight.https:\u002F\u002Fsupport.rockwellautomation.com\u002Fapp\u002Fanswers\u002Fanswer_view\u002Fa_id\u002F1085012\u002Floc\u002Fen_US#__highlight MitigationFor more information, see Rockwell Automation Security Advisories: https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html.https:\u002F\u002Fwww.rockwellautomation.com\u002Fen-us\u002Ftrust-center\u002Fsecurity-advisories.html Relevant CWE: CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.5 HIGH CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H 4.0 8.7 HIGH CVSS:4.0\u002FAV:N\u002FAC:L\u002FAT:N\u002FPR:N\u002FUI:N\u002FVC:N\u002FVI:N\u002FVA:H\u002FSC:N\u002FSI:N\u002FSA:N Acknowledgments Rockwell Automation reported these vulnerabilities to CISA Legal Notice and Terms of Use This product is provided subject to this Notification (https:\u002F\u002Fwww.cisa.gov\u002Fnotification) and this Privacy & Use policy (https:\u002F\u002Fwww.cisa.gov\u002Fprivacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Minimize network exposure for all control system devices and\u002For systems, ensuring they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov\u002Fics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended p","https:\u002F\u002Fwww.cisa.gov\u002Fnews-events\u002Fics-advisories\u002Ficsa-26-244-01",null,"2026-09-01T12:00:00+00:00","2026-09-01T16:00:19.281377+00:00",8,[18,21],{"name":19,"type":20},"RSLinx Classic","product",{"name":22,"type":23},"Rockwell Automation","vendor","80544778-fabb-4dcd-aa35-17492e5dcf4f",{"id":24,"icon":13,"name":26,"slug":27},"Vulnerabilities","vulnerabilities",[29,34,36,41],{"category":30},{"id":31,"icon":13,"name":32,"slug":33},"6cbdd207-aaa1-4176-9534-e156b125e917","Nation-state","nation-state",{"category":35},{"id":24,"icon":13,"name":26,"slug":27},{"category":37},{"id":38,"icon":13,"name":39,"slug":40},"d6f63bb8-0801-486a-be7f-171400700454","IoT\u002FOT","iot-ot",{"category":42},{"id":43,"icon":13,"name":44,"slug":45},"e7b231c8-5f79-4465-8d38-1ef13aea5a14","Threat Intelligence","threat-intelligence",[47,51,54,57],{"type":48,"value":49,"context":50},"cve","CVE-2026-9621","Denial-of-service vulnerability in RSLinx Classic due to malformed packet handling.",{"type":48,"value":52,"context":53},"CVE-2026-9622","Denial-of-service vulnerability in RSLinx Classic targeting the Forward Close service.",{"type":48,"value":55,"context":56},"CVE-2026-9624","Denial-of-service vulnerability in RSLinx Classic due to insufficient data length validation.",{"type":48,"value":58,"context":59},"CVE-2026-9625","Denial-of-service vulnerability in RSLinx Classic with oversized embedded message requests."]