CVE-2026-51540

Memory Corruption via Integer Underflow in OpENer SendUnitData

Published Jul 13, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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).

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Opener Project
Opener Project opener
CPEs cpe:2.3:a:opener_project:opener:2.3.0:*:*:*:*:*:*:*
Vendors & Products Opener Project
Opener Project opener
Type Values Removed Values Added
Title Memory Corruption via Integer Underflow in OpENer SendUnitData
Type Values Removed Values Added
Title Integer Underflow in OpENer SendUnitData Leading to Memory Corruption
Type Values Removed Values Added
Title Integer Underflow in OpENer SendUnitData Leading to Memory Corruption
Type Values Removed Values Added
Title Integer Underflow in OpENer SendUnitData Leading to Memory Corruption
Type Values Removed Values Added
Title Integer Underflow in OpENer SendUnitData Leading to Memory Corruption
Type Values Removed Values Added
Weaknesses CWE-191
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Eipstackgroup
Eipstackgroup opener
Vendors & Products Eipstackgroup
Eipstackgroup opener
Type Values Removed Values Added
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
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Jul 14, 2026, 4:27 PM
Reserved
Jun 8, 2026, 12:00 AM
Status
Analyzed
Published
Jul 13, 2026, 10:16 PM
Modified
Aug 11, 2026, 4:27 PM