CVE-2026-2877 Tenda A18 Httpd Service WifiExtraSet strcpy stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Tenda A18 router's Httpd service via the WifiExtraSet endpoint, potentially leading to 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-2026-2877?
CVE-2026-2877 is a high-severity memory corruption vulnerability in Tenda A18, published on 21 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability has been found in Tenda A18 15.13.07.13. This affects the function strcpy of the file /goform/WifiExtraSet of the component Httpd Service. The manipulation of the argument wpapsk_crypto5g leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2026-2877?
It affects 1 product.
Products include Tenda A18 Firmware.
How do I fix CVE-2026-2877?
No fix has been published for CVE-2026-2877 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-2026-2877 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2877 exists.
Other vulnerabilities in Tenda A18
Sources
Also known as GHSA-69vg-2v33-6p2v.