CVE-2026-5830 Tenda AC15 SysToolChangePwd websGetVar stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the password change function of Tenda AC15 routers, 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-2026-5830?
CVE-2026-5830 is a high-severity memory corruption vulnerability in Tenda Ac15 Firmware, 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 identified in Tenda AC15 15.03.05.18. This affects the function websGetVar of the file /goform/SysToolChangePwd. Such manipulation of the argument oldPwd/newPwd/cfmPwd leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used.
Which versions are affected by CVE-2026-5830?
It affects 1 product.
Products include Tenda Ac15 Firmware.
How do I fix CVE-2026-5830?
No fix has been published for CVE-2026-5830 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-2026-5830 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5830 exists.
Other vulnerabilities in Tenda Ac15 Firmware
Sources
Also known as GHSA-3hw6-fxjg-9c93.