CVE-2026-67822 Memory corruption in n/a
A stack-based buffer overflow in the Tenda W6-S router allows attackers to execute arbitrary code or cause a denial of service via crafted parameters.
- 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-2026-67822?
CVE-2026-67822 is a critical memory corruption vulnerability in n/a, published on 31 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Tenda W6-S 1.0.0.4(510) contains a stack-based buffer overflow vulnerability in the /goform/wifiSSIDset endpoint. The function formwrlSSIDset uses sprintf to copy user-controlled 'GO' and 'index' parameters into a 64-byte stack buffer without length restriction, leading to stack overflow.
Weakness: CWE-121
Which versions are affected by CVE-2026-67822?
How do I fix CVE-2026-67822?
No fix has been published for CVE-2026-67822 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-2026-67822 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67822 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-3xxh-hm67-x74r.