CVE-2026-6121 Tenda F451 httpd WrlclientSet stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Tenda F451 router's httpd service via the WrlclientSet function, 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-2026-6121?
CVE-2026-6121 is a high-severity memory corruption vulnerability in Tenda F451, published on 12 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw has been found in Tenda F451 1.0.0.7. Affected by this vulnerability is the function WrlclientSet of the file /goform/WrlclientSet of the component httpd. This manipulation of the argument GO causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been published and may be used.
Which versions are affected by CVE-2026-6121?
It affects 1 product.
Products include Tenda F451 Firmware.
How do I fix CVE-2026-6121?
No fix has been published for CVE-2026-6121 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-2026-6121 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6121 exists.
Other vulnerabilities in Tenda F451
- CVE-2026-6120 Tenda F451 httpd DhcpListClient fromDhcpListClient stack-based overflow
- CVE-2026-6122 Tenda F451 httpd L7Prot frmL7ProtForm stack-based overflow
- CVE-2026-6123 Tenda F451 httpd addressNat fromAddressNat stack-based overflow
- CVE-2026-6124 Tenda F451 httpd SafeMacFilter fromSafeMacFilter stack-based overflow
- CVE-2026-6133 Tenda F451 SafeUrlFilter fromSafeUrlFilter stack-based overflow
Sources
Also known as GHSA-hq9c-mf84-h34f.