CVE-2026-51221 Memory corruption in n/a
Attackers can cause a Denial of Service in EIPStackGroup OpENer by sending a crafted Common Packet Format packet that triggers a buffer overflow.
- 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-2026-51221?
CVE-2026-51221 is a high-severity memory corruption vulnerability in n/a, published on 29 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A buffer overflow in the Get_Attribute_List function of EIPStackGroup OpENer commit 76b95c allows attackers to cause a Denial of Service (DoS) via supplying a crafted Common Packet Format (CPF) packet.
Weakness: CWE-284
Which versions are affected by CVE-2026-51221?
How do I fix CVE-2026-51221?
No fix has been published for CVE-2026-51221 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-2026-51221 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-51221 exists.
Sources
Also known as GHSA-p26f-vx3f-455g.