CVE-2025-57639 Command injection in n/a
Attackers can execute arbitrary OS commands on Tenda AC9 routers via the usb.samba.guest.user parameter in the httpd 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-2025-57639?
CVE-2025-57639 is a medium-severity command injection vulnerability in Tenda Ac9 Firmware, published on 23 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OS Command injection vulnerability in Tenda AC9 1.0 was discovered to contain a command injection vulnerability via the usb.samba.guest.user parameter in the formSetSambaConf function of the httpd file.
Weakness: CWE-78
Which versions are affected by CVE-2025-57639?
It affects 1 product.
Products include Tenda Ac9 Firmware.
How do I fix CVE-2025-57639?
No fix has been published for CVE-2025-57639 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2025-57639 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-57639 exists.
Other vulnerabilities in Tenda Ac9 Firmware
Sources
Also known as GHSA-9745-w7f4-f37c.