CVE-2026-36821 Memory corruption in n/a
Attackers can cause a Denial of Service on Tenda W20E routers via a crafted HTTP request exploiting a buffer overflow.
- 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-2026-36821?
CVE-2026-36821 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 W20E v15.11.0.6 was discovered to contain a buffer overflow in the picCropName parameter of the formCropAndSetWewifiPic function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.
Weakness: CWE-121
Which versions are affected by CVE-2026-36821?
How do I fix CVE-2026-36821?
No fix has been published for CVE-2026-36821 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-2026-36821 being exploited?
There is no known exploitation of CVE-2026-36821 in the wild and no public exploit code.
Sources
Also known as GHSA-c8gj-cfmh-54rq.