CVE-2026-51541 Memory corruption in n/a
An attacker can trigger an out-of-bounds read in OpENer by sending malformed CIP requests, potentially causing crashes or leaking memory.
- 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-2026-51541?
CVE-2026-51541 is a critical memory corruption 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 (commit 76b95cf) has an out-of-bounds read issue in CIP message parsing when handling malformed explicit requests with a forged EPath size. An attacker can send a valid ENIP SendRRData frame carrying a very short CIP payload whose path_size field claims that many more path words are present than are actually available. Because the parser trusts the attacker-controlled path_size and continues decoding path segments without a remaining-length boundary, it reads beyond the end of the stack receive buffer.
Weakness: CWE-125
Which versions are affected by CVE-2026-51541?
It affects 1 product.
Products include Opener Project Opener.
How do I fix CVE-2026-51541?
No fix has been published for CVE-2026-51541 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-51541 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-51541 exists.
Other vulnerabilities in n/a
Sources
Also known as GHSA-6q7w-q386-7c4j.