CVE-2026-19789 Tenda AC1206 httpd web management interface WifiGuestSet set_wl_guest_iplist stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Tenda AC1206 router's web interface to potentially execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19789?
CVE-2026-19789 is a high-severity memory corruption vulnerability in Tenda AC1206, published on 14 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was determined in Tenda AC1206 15.03.06.23_multi_TD01. This vulnerability affects the function set_wl_guest_iplist of the file /goform/WifiGuestSet of the component httpd web management interface. This manipulation of the argument shareSpeed causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized.
Which versions are affected by CVE-2026-19789?
How do I fix CVE-2026-19789?
No fix has been published for CVE-2026-19789 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-2026-19789 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19789 exists.
Sources
Also known as GHSA-xq4w-6936-w8h4.