CVE-2026-51540

9.8 criticalEPSS 0.6%

Critical (9.8) in opener project opener. EPSS 0.6% chance of exploitation in the next 30 days.

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).

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 46% of CVEs (scores of 2026-10-31)
CWE: CWE-191
Published: 2026-07-13
Modified: 2026-08-11
Record from: the NVD, synced 2026-10-19

Affected

opener_project:opener

References

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

Check your stack JSON