CVE-2026-51540 | OpENer 2.3.0 (master branch up to commit 76b95cf) is vulnera… | CVSS 9.8 CRITICAL

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).

Metadata

CVE ID: CVE-2026-51540
State: PUBLISHED
Assigner: mitre
Reserved: 2026-06-08 00:00 UTC
Published: 2026-07-13 00:00 UTC
Last updated: 2026-07-14 16:27 UTC
Primary CWE: CWE-191
CWE-191 Integer Underflow (Wrap or Wraparound)
Vendor / Product: n/a / n/a
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
n/a	n/a	—	n/a

Weakness (CWE)

CWE	Source	Description
—	cna	n/a
CWE-191	adp	CWE-191 Integer Underflow (Wrap or Wraparound)

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (2)