CVE-2026-3727 Tenda F453 QuickIndex sub_3C6C0 stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Tenda F453 router via the QuickIndex endpoint, potentially leading to code execution or service disruption.
- 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-2026-3727?
CVE-2026-3727 is a high-severity memory corruption vulnerability in Tenda F453, published on 8 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in Tenda F453 1.0.0.3. This vulnerability affects the function sub_3C6C0 of the file /goform/QuickIndex. The manipulation of the argument mit_linktype/PPPOEPassword results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been made public and could be used.
Which versions are affected by CVE-2026-3727?
It affects 1 product.
Products include Tenda F453 Firmware.
How do I fix CVE-2026-3727?
No fix has been published for CVE-2026-3727 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-2026-3727 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3727 exists.
Other vulnerabilities in Tenda F453
- CVE-2026-5021 Tenda F453 httpd PPTPUserSetting fromPPTPUserSetting stack-based overflow
- CVE-2026-4551 Tenda F453 Parameters SafeClientFilter fromSafeClientFilter memory corruption
- CVE-2026-4552 Tenda F453 Parameters VirtualSer fromVirtualSer memory corruption
- CVE-2026-4553 Tenda F453 Parameters Natlimit fromNatlimit stack-based overflow
- CVE-2026-3726 Tenda F453 webExcptypemanFilter fromwebExcptypemanFilter stack-based overflow
Sources
Also known as GHSA-q23r-q5j4-fj7h.