CVE-2025-63835 Memory corruption in n/a
Remote attackers can cause denial of service or potential code execution on Tenda AC18 routers via a stack-based buffer overflow in the guestSsid parameter.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-63835?
CVE-2025-63835 is a medium-severity memory corruption vulnerability in Tenda Ac18 Firmware, published on 10 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A stack-based buffer overflow vulnerability was discovered in Tenda AC18 v15.03.05.05_multi. The vulnerability exists in the guestSsid parameter of the /goform/WifiGuestSet interface. Remote attackers can exploit this vulnerability by sending oversized data to the guestSsid parameter, leading to denial of service (device crash) or potential remote code execution.
Which versions are affected by CVE-2025-63835?
It affects 1 product.
Products include Tenda Ac18 Firmware.
How do I fix CVE-2025-63835?
No fix has been published for CVE-2025-63835 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-2025-63835 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63835 exists.
Other vulnerabilities in Tenda Ac18 Firmware
Sources
Also known as GHSA-2mgg-5ppq-j685.