CVE-2026-96257 Fast FAC1203R Gigabit Edition Device Discovery Service copy_msg_element stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Device Discovery Service of Fast FAC1203R devices, potentially leading to code execution.
- 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-2026-96257?
CVE-2026-96257 is a critical memory corruption vulnerability in Fast FAC1203R Gigabit Edition, published on 23 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw has been found in Fast FAC1203R Gigabit Edition 2.0.4. Affected by this issue is the function copy_msg_element of the component Device Discovery Service. Executing a manipulation can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-96257?
How do I fix CVE-2026-96257?
No fix has been published for CVE-2026-96257 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-2026-96257 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-96257 exists.
Sources
Also known as GHSA-fgvq-2jw8-748x.