CVE-2025-8810 Tenda AC20 SetFirewallCfg strcpy stack-based overflow
A remote attacker can trigger a stack-based buffer overflow in the Tenda AC20 router's firewall configuration interface, potentially leading to code execution or service disruption.
- 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-2025-8810?
CVE-2025-8810 is a high-severity memory corruption vulnerability in Tenda AC20, published on 10 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability classified as critical was found in Tenda AC20 16.03.08.05. Affected by this vulnerability is the function strcpy of the file /goform/SetFirewallCfg. The manipulation of the argument firewallEn leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2025-8810?
It affects 1 product.
Products include Tenda Ac20 Firmware.
How do I fix CVE-2025-8810?
No fix has been published for CVE-2025-8810 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-2025-8810 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-8810 exists.
Other vulnerabilities in Tenda AC20
- CVE-2025-15356 Tenda AC20 PowerSaveSet sscanf buffer overflow
- CVE-2025-14654 Tenda AC20 httpd setPptpUserList formSetPPTPUserList stack-based overflow
- CVE-2025-14655 Tenda AC20 httpd SetSysAutoRebbotCfg formSetRebootTimer stack-based overflow
- CVE-2025-14656 Tenda AC20 openSchedWifi httpd buffer overflow
- CVE-2025-13258 Tenda AC20 WifiExtraSet buffer overflow
Sources
Also known as GHSA-6rv7-jp9x-7f4x.