CVE-2026-22318 Stack-Based Buffer Overflow in File Transfer Parameter Handling
A high-privileged attacker can cause a denial of service via stack-based buffer overflow in file transfer parameter handling on Phoenix Contact switches.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-22318?
CVE-2026-22318 is a medium-severity memory corruption vulnerability in Phoenix Contact FL NAT 2008, published on 18 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A stack-based buffer overflow vulnerability in the device's file transfer parameter workflow allows a high-privileged attacker to send oversized POST parameters, causing memory corruption in an internal process, resulting in a DoS attack.
Weakness: CWE-121
Which versions are affected by CVE-2026-22318?
How do I fix CVE-2026-22318?
No fix has been published for CVE-2026-22318 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-2026-22318 being exploited?
There is no known exploitation of CVE-2026-22318 in the wild and no public exploit code.
Sources
Also known as GHSA-2957-vcfc-fpfc.