CVE-2026-51540: Integer Underflow
Published Jul 13, 2026
·Updated
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).
Affected Software
2 affected components
OpENer<=2.3.0
Opener Project Opener=2.3.0
Event History
Jul 13, 2026
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·10:16 PM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
Which deployments are exposed?
Deployments using OpENer 2.3.0 from the master branch up to commit 76b95cf are affected.
2
What does an attacker need to exploit this issue?
The CVSS vector indicates exploitation is network-accessible, requires low attack complexity, no privileges, and no user interaction. Successful exploitation can affect confidentiality, integrity, and availability.