CVE-2026-22316 Buffer Overflow using TFTP Filename
Remote authenticated attackers can cause a denial of service via a stack-based buffer overflow in the TFTP filename setting.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-22316?
CVE-2026-22316 is a medium-severity memory corruption vulnerability in Phoenix Contact FL NAT 2008, published on 18 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A remote attacker with user privileges for the webUI can use the setting of the TFTP Filename with a POST Request to trigger a stack-based Buffer Overflow, resulting in a DoS attack.
Weakness: CWE-121
Which versions are affected by CVE-2026-22316?
How do I fix CVE-2026-22316?
No fix has been published for CVE-2026-22316 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-2026-22316 being exploited?
There is no known exploitation of CVE-2026-22316 in the wild and no public exploit code.
Sources
Also known as GHSA-c7gg-49qc-mfhm.