CVE-2026-101354 FAST FAC1203R MmtAtePrase _tWlanTask stack-based overflow
A stack-based buffer overflow in the MmtAtePrase parser allows local network attackers to execute arbitrary code on FAST FAC1203R routers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-101354?
CVE-2026-101354 is a critical memory corruption vulnerability in FAST FAC1203R, published on 29 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A security flaw has been discovered in FAST FAC1203R 20200116_2.0.4. The affected element is the function _tWlanTask of the component MmtAtePrase Parser. Performing a manipulation results in stack-based buffer overflow. The attacker must have access to the local network to execute the attack. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-101354?
How do I fix CVE-2026-101354?
No fix has been published for CVE-2026-101354 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-2026-101354 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101354 exists.
Sources
Also known as GHSA-ccwh-mr5w-5j9f.