CVE-2025-59366 Auth bypass in Router
Attackers can bypass authentication in AiCloud via Samba side effects to execute functions without authorization on ASUS routers.
- 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-2025-59366?
CVE-2025-59366 is a critical authentication bypass vulnerability in ASUS Router, published on 25 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An authentication-bypass vulnerability exists in AiCloud. This vulnerability can be triggered by an unintended side effect of the Samba functionality, potentially leading to allow execution of specific functions without proper authorization.
Refer to the Security Update for ASUS Router Firmware section on the ASUS Security Advisory for more information.
Which versions are affected by CVE-2025-59366?
How do I fix CVE-2025-59366?
No fix has been published for CVE-2025-59366 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-59366 being exploited?
There is no known exploitation of CVE-2025-59366 in the wild and no public exploit code.
Sources
Also known as GHSA-5xfw-547q-p6mq.