CVE-2026-5991 Tenda F451 WrlExtraSet formWrlExtraSet stack-based overflow
A remote attacker can trigger a stack-based buffer overflow in the Tenda F451 router's WrlExtraSet form, potentially leading to arbitrary code execution.
- 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-2026-5991?
CVE-2026-5991 is a high-severity memory corruption vulnerability in Tenda F451, published on 9 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in Tenda F451 1.0.0.7. Affected by this issue is the function formWrlExtraSet of the file /goform/WrlExtraSet. The manipulation of the argument GO results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been made public and could be used.
Which versions are affected by CVE-2026-5991?
It affects 1 product.
Products include Tenda F451 Firmware.
How do I fix CVE-2026-5991?
No fix has been published for CVE-2026-5991 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-2026-5991 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5991 exists.
Other vulnerabilities in Tenda F451
- CVE-2026-6120 Tenda F451 httpd DhcpListClient fromDhcpListClient stack-based overflow
- CVE-2026-6121 Tenda F451 httpd WrlclientSet 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
Sources
Also known as GHSA-rv6j-fg2j-q2fj.