CVE-2026-3398 Tenda F453 httpd AdvSetWan fromAdvSetWan buffer overflow
Remote attackers can trigger a buffer overflow in the Tenda F453 router's httpd service via crafted WAN settings, 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-2026-3398?
CVE-2026-3398 is a high-severity memory corruption vulnerability in Tenda F453, published on 1 Mar 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 F453 1.0.0.3. Affected is the function fromAdvSetWan of the file /goform/AdvSetWan of the component httpd. Executing a manipulation of the argument wanmode/PPPOEPassword can lead to buffer overflow. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized.
Which versions are affected by CVE-2026-3398?
It affects 1 product.
Products include Tenda F453 Firmware.
How do I fix CVE-2026-3398?
No fix has been published for CVE-2026-3398 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-2026-3398 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3398 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-cq3q-fvgg-2rjc.