CVE-2026-36779 Memory corruption in n/a
Attackers can cause a Denial of Service on Tenda O3 routers via crafted HTTP requests triggering stack overflows.
- 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-2026-36779?
CVE-2026-36779 is a high-severity memory corruption vulnerability in n/a, published on 9 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Shenzhen Tenda Technology Co., Ltd Tenda O3 Wireless Router v1.0.0.5(4180) was discovered to contain multiple stack overflows in the fromVirtualSer function via the puVar2, puVar1, __s2, __s1_00, and puVar3 parameters. These vulnerabilities allow attackers to cause a Denial of Service (DoS) via a crafted HTTP request.
Weakness: CWE-121
Which versions are affected by CVE-2026-36779?
How do I fix CVE-2026-36779?
No fix has been published for CVE-2026-36779 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-2026-36779 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-36779 exists.
Sources
Also known as GHSA-f925-7482-grm3.