OpenCode Systems OC Messaging and USSD Gateway

Summary

A high-severity improper access control vulnerability (CVE-2025-70614) in OpenCode Systems OC Messaging and USSD Gateway 6.32.2 allows authenticated low-privileged users to access SMS messages outside their authorized tenant scope via crafted identifier parameters. The vulnerability affects critical communications infrastructure worldwide and was remediated on January 6, 2026 with version 6.33.11. CISA reported no active public exploitation as of the advisory date.

Full text

ICS Advisory OpenCode Systems OC Messaging and USSD Gateway Release DateMarch 26, 2026 Alert CodeICSA-26-085-02 Related topics: Industrial Control System Vulnerabilities, Industrial Control Systems View CSAF Summary Successful exploitation of this vulnerability could allow an authenticated low-privileged user to gain access to SMS messages outside of their authorized tenant scope via a crafted company or tenant identifier parameter. The following versions of OpenCode Systems OC Messaging and USSD Gateway are affected: OC Messaging 6.32.2 (CVE-2025-70614) USSD Gateway 6.32.2 (CVE-2025-70614) CVSS Vendor Equipment Vulnerabilities v3 8.1 OpenCode Systems OpenCode Systems OC Messaging and USSD Gateway Improper Access Control Background Critical Infrastructure Sectors: Communications Countries/Areas Deployed: Worldwide Company Headquarters Location: Bulgaria Vulnerabilities Expand All + CVE-2025-70614 OpenCode Systems Custom Messaging Gateway 6.32.2 contains a web access vulnerability allowing one authenticated user to gain access to another authenticated user's messages via a crafted identifier parameter. View CVE Details Affected Products OpenCode Systems OC Messaging and USSD Gateway Vendor:OpenCode Systems Product Version:OpenCode Systems OC Messaging: 6.32.2, OpenCode Systems USSD Gateway: 6.32.2 Product Status:known_affected Remediations MitigationThe vulnerability was identified by OpenCode Systems on January 5, 2026 and remediated on January 6, 2026 with the release of version 6.33.11. MitigationFor more information, contact OpenCode: https://opencode.com/about/contact-ushttps://opencode.com/about/contact-us Relevant CWE: CWE-284 Improper Access Control Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.1 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Acknowledgments Hussein Amer 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. 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 this vulnerability has been reported to CISA at this time. Revision History Initial Release Date: 2026-03-26 Date Revision Summary 2026-03-26 1 Initial Publication Legal Notice and Terms of Use This product is provided subject to this Notification and this Privacy & Use policy. Tags Sector: Communications 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 Mar 26, 2026 ICS Advisory | ICSA-26-085-03 PTC Windchill Product Lifecycle Management Mar 26, 2026 ICS Advisory | ICSA-26-085-01 WAGO GmbH & Co. KG Industrial Managed Switches Mar 24, 2026 ICS Advisory | ICSA-26-083-01 Pharos Controls Mosaic Show Controller Mar 24, 2026 ICS Advisory | ICSA-26-083-03 Schneider Electric Plant iT/Brewmaxx

Indicators of Compromise

• cve — CVE-2025-70614
• malware — CWE-284