CVE-2025-9091 Tenda AC20 shadow hard-coded credentials
Hard-coded credentials in the shadow file allow local attackers to gain elevated privileges and access sensitive data on Tenda AC20 routers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-9091?
CVE-2025-9091 is a low-severity vulnerability in Tenda AC20, published on 17 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A security flaw has been discovered in Tenda AC20 16.03.08.12. Affected by this vulnerability is an unknown functionality of the file /etc_ro/shadow. The manipulation leads to hard-coded credentials. It is possible to launch the attack on the local host. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2025-9091?
It affects 1 product.
Products include Tenda Ac20 Firmware.
How do I fix CVE-2025-9091?
No fix has been published for CVE-2025-9091 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-9091 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9091 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-vq2h-cfxr-pp9q.