CVE-2026-4252 Tenda AC8 IPv6 check_is_ipv6 ip address for authentication
Attackers can bypass authentication on Tenda AC8 routers by exploiting IPv6 address reliance in the check_is_ipv6 function.
- 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-2026-4252?
CVE-2026-4252 is a critical authentication bypass vulnerability in Tenda Ac8 Firmware, published on 16 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was identified in Tenda AC8 16.03.50.11. Affected by this issue is the function check_is_ipv6 of the component IPv6 Handler. The manipulation leads to reliance on ip address for authentication. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.
Which versions are affected by CVE-2026-4252?
It affects 1 product.
Products include Tenda Ac8 Firmware.
How do I fix CVE-2026-4252?
No fix has been published for CVE-2026-4252 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-2026-4252 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4252 exists.
Other vulnerabilities in Tenda Ac8 Firmware
Sources
Also known as GHSA-7fp9-cvqr-rwmf.