CVE-2026-4567 Tenda A15 UploadCfg stack-based overflow

Critical 9.3 Published 23 Mar 2026 Updated 23 Mar 2026

Remote attackers can trigger a stack-based buffer overflow in the UploadCfg function of Tenda A15 routers, potentially leading to code execution or service disruption.

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-2026-4567?

CVE-2026-4567 is a critical memory corruption vulnerability in Tenda A15, published on 23 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability has been found in Tenda A15 15.13.07.13. The impacted element is the function UploadCfg of the file /cgi-bin/UploadCfg. The manipulation of the argument File leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-121, CWE-119

Which versions are affected by CVE-2026-4567?

It affects 1 product.

Products include Tenda A15 Firmware.

How do I fix CVE-2026-4567?

No fix has been published for CVE-2026-4567 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-2026-4567 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4567 exists.

Public exploit code: 1 proofs of concept on GitHub.

Sources

Also known as GHSA-xhj3-xwvq-rwxj.