CVE-2026-51540

OpENer 2.3.0 (master branch up to commit 76b95cf) is vulnerable to a severe memory corruption issue caused by an integer underflow in the processing of connected explicit messages (SendUnitData).

• CWE-191

• https://gist.github.com/MrAlaskan/5e0c2af7f4a1d188814c7fa8f812c8daThird Party Advisory
• https://github.com/EIPStackGroup/OpENer/issues/568Exploit, Issue Tracking, Vendor Advisory
• https://github.com/EIPStackGroup/OpENer/issues/568Exploit, Issue Tracking, Vendor Advisory

Published

Jul 13, 2026

Last Modified

Aug 11, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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• CVE-2026-51537EIPStackGroup OpENer 2.3.0 (commit 76b95cf) has an out-of-bo…9.1
• CVE-2026-51538EIPStackGroup OpENer 2.3.0 (commit 76b95cf) suffers from an …9.1
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