Carlson Software VASCO-B GNSS Receiver

Summary

CISA disclosed a critical vulnerability (CVE-2026-3893, CVSS 9.4) in Carlson Software VASCO-B GNSS Receiver versions prior to 1.4.0, where missing authentication allows remote attackers to directly access and modify device configuration and operational functions. The flaw affects critical manufacturing infrastructure worldwide. Carlson Software recommends immediate update to version 1.4.0 or later; no known public exploitation has been reported.

Full text

ICS Advisory Carlson Software VASCO-B GNSS Receiver Release DateApril 23, 2026 Alert CodeICSA-26-113-02 Related topics: Industrial Control System Vulnerabilities, Industrial Control Systems View CSAF Summary Successful exploitation of this vulnerability could enable a remote attacker to alter critical system functions or disrupt device operation. The following versions of Carlson Software VASCO-B GNSS Receiver are affected: VASCO-B GNSS Receiver <1.4.0 (CVE-2026-3893) CVSS Vendor Equipment Vulnerabilities v3 9.4 Carlson Software Carlson Software VASCO-B GNSS Receiver Missing Authentication for Critical Function Background Critical Infrastructure Sectors: Critical Manufacturing Countries/Areas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2026-3893 The Carlson VASCO-B GNSS Receiver lacks an authentication mechanism, allowing an attacker with network access to directly access and modify its configuration and operational functions without needing credentials. View CVE Details Affected Products Carlson Software VASCO-B GNSS Receiver Vendor:Carlson Software Product Version:Carlson Software VASCO-B GNSS Receiver: <1.4.0 Product Status:known_affected Remediations MitigationCarlson Software recommends users update to Version 1.4.0 or greater. For more information contact Carlson Software https://www.carlsonsw.com/support-and-training/https://www.carlsonsw.com/support-and-training/ Relevant CWE: CWE-306 Missing Authentication for Critical Function Metrics CVSS Version Base Score Base Severity Vector String 3.1 9.4 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H Acknowledgments Souvik Kandar reported this vulnerability to CISA Legal Notice and Terms of Use This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Minimize network exposure for all control system devices and/or 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/ics. 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/ics 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. No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. Revision History Initial Release Date: 2026-04-23 Date Revision Summary 2026-04-23 1 Initial Publication Legal Notice and Terms of Use This product is provided subject to this Notification and this Privacy & Use policy. Tags Sector: Critical Manufacturing Sector Topics: Industrial Control System Vulnerabilities, Industrial Control Systems Please share your thoughts We recently updated our anonymous product survey; we welcome your feedback. Related Advisories Apr 23, 2026 ICS Advisory | ICSA-26-113-06 Intrado 911 Emergency Gateway (EGW) Apr 23, 2026 ICS Advisory | ICSA-26-113-05 Hangzhou Xiongmai Technology Co., Ltd XM530 IP Camera Apr 23, 2026 ICS Advisory | ICSA-26-113-03 Milesight Cameras Apr 23, 2026 ICS Advisory | ICSA-26-113-01 Yadea T5 Electric Bicycle

Indicators of Compromise

• cve — CVE-2026-3893

Entities