CVE-2025-14655 Tenda AC20 httpd SetSysAutoRebbotCfg formSetRebootTimer stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Tenda AC20 router's httpd service via the reboot timer configuration, potentially leading to code execution or crashes.
- 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-2025-14655?
CVE-2025-14655 is a high-severity memory corruption vulnerability in Tenda AC20, published on 14 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A security flaw has been discovered in Tenda AC20 16.03.08.12. The impacted element is the function formSetRebootTimer of the file /goform/SetSysAutoRebbotCfg of the component httpd. Performing a manipulation of the argument rebootTime results in stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks.
Which versions are affected by CVE-2025-14655?
It affects 1 product.
Products include Tenda Ac20 Firmware.
How do I fix CVE-2025-14655?
No fix has been published for CVE-2025-14655 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-2025-14655 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-14655 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-2025-14656 Tenda AC20 openSchedWifi httpd buffer overflow
- CVE-2025-13258 Tenda AC20 WifiExtraSet buffer overflow
- CVE-2025-11385 Tenda AC20 fast_setting_wifi_set sscanf buffer overflow
Sources
Also known as GHSA-w32p-pwv5-9jr3.