CVE-2026-51540 Integer overflow in n/a

Critical 9.8 Published 13 Jul 2026 Updated 14 Jul 2026

An integer underflow in OpENer's message processing allows attackers to trigger memory corruption, potentially leading to code execution or denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-51540?

CVE-2026-51540 is a critical vulnerability in n/a, published on 13 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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).

Weakness: CWE-191

Which versions are affected by CVE-2026-51540?

It affects 1 product.

Products include Opener Project Opener.

How do I fix CVE-2026-51540?

No fix has been published for CVE-2026-51540 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-51540 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-51540 exists.

Sources

Also known as GHSA-vq3c-wgc6-rvmq.