CVE-2025-9605 Tenda AC21/AC23 GetParentControlInfo stack-based overflow
A remote attacker can trigger a stack-based buffer overflow in Tenda AC21/AC23 routers via the GetParentControlInfo function, potentially leading to code execution or denial of service.
- 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-2025-9605?
CVE-2025-9605 is a critical memory corruption vulnerability in Tenda AC21, published on 29 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A security vulnerability has been detected in Tenda AC21 and AC23 16.03.08.16. Affected is the function GetParentControlInfo of the file /goform/GetParentControlInfo. Such manipulation of the argument mac leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly and may be used.
Which versions are affected by CVE-2025-9605?
It affects 2 products.
Products include Tenda Ac21 Firmware, Tenda Ac23 Firmware.
How do I fix CVE-2025-9605?
No fix has been published for CVE-2025-9605 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-2025-9605 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9605 exists.
Other vulnerabilities in Tenda AC21
- CVE-2023-24333 Command injection in n/a
- CVE-2026-4565 Tenda AC21 SetNetControlList formSetQosBand buffer overflow
- CVE-2026-1637 Tenda AC21 AdvSetMacMtuWan fromAdvSetMacMtuWan stack-based overflow
- CVE-2025-13445 Tenda AC21 SetIpMacBind stack-based overflow
- CVE-2025-13446 Tenda AC21 SetSysTimeCfg stack-based overflow
Sources
Also known as GHSA-f8m7-hvrf-gm4v.