CVE-2026-101038 FAST FAC1200R MmtAtePrase stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the MmtAtePrase function of FAST FAC1200R devices, potentially leading to code execution or denial of service.
- 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-2026-101038?
CVE-2026-101038 is a critical memory corruption vulnerability in FAST FAC1200R, published on 28 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was determined in FAST FAC1200R 5.0_20201119_1.0.2. Affected by this vulnerability is the function MmtAtePrase of the component MmtAtePrase Parser. This manipulation causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-101038?
How do I fix CVE-2026-101038?
No fix has been published for CVE-2026-101038 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-2026-101038 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101038 exists.
Sources
Also known as GHSA-49h3-g5vf-r66w.