# Critical Access Control Vulnerability Discovered in OpenCode Systems Messaging Gateways ## Summary A significant security vulnerability has been discovered in **OpenCode Systems** OC Messaging and USSD Gateway. 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 vulnerability is tracked as **CVE-2025-70614**. 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**) ## Vulnerability Details | 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 ### 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](https://www.cve.org/CVERecord?id=CVE-2025-70614) --- #### 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 **Relevant CWE:** [CWE-284 Improper Access Control](https://cwe.mitre.org/data/definitions/284.html) --- #### Metrics ## Mitigation Recommendations The **Cybersecurity and Infrastructure Security Agency (CISA)** recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Key recommendations include: * 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. ## Additional Resources 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. --- ## Acknowledgments Hussein Amer reported this vulnerability to CISA. ## Revision History | Date | Revision | Summary | | :--------- | :------- | :----------------- | | 2026-03-26 | 1 | Initial Publication | --- [View CSAF](https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-085-02.json)