CVE-2026-51540

CRITICAL

OpENer <= 2.3.0 - Memory Corruption via Integer Underflow in SendUnitData Message Processing

Title source: llm
STIX 2.1

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).

References (2)

Core 2

Scores

CVSS v3 9.8
EPSS 0.0038
EPSS Percentile 30.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-191
Status published
Published Jul 13, 2026
Tracked Since Jul 14, 2026