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CVE-2026-51540: OpENer Memory Corruption Risk in Explicit Messages

CVE-2026-51540 CVE-2026-51540

Summary

The OpENer messaging software is at risk of a critical memory corruption issue when handling certain types of messages. This could lead to unexpected crashes or data loss. Update to the latest version to mitigate this risk.

Original title

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).

Original description

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).

Vulnerability type

CWE-191

https://gist.github.com/MrAlaskan/5e0c2af7f4a1d188814c7fa8f812c8da
https://github.com/EIPStackGroup/OpENer/issues/568

Published: 13 Jul 2026 · Updated: 20 Jul 2026 · First seen: 13 Jul 2026