CVE-2026-5684 Tenda CX12L webExcptypemanFilter fromwebExcptypemanFilter stack-based overflow
A stack-based buffer overflow in the Tenda CX12L router allows local network attackers to execute arbitrary code or cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5684?
CVE-2026-5684 is a high-severity memory corruption vulnerability in Tenda CX12L, published on 6 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was determined in Tenda CX12L 16.03.53.12. Affected by this issue is the function fromwebExcptypemanFilter of the file /goform/webExcptypemanFilter. Executing a manipulation of the argument page can lead to stack-based buffer overflow. The attack requires access to the local network. The exploit has been publicly disclosed and may be utilized.
Which versions are affected by CVE-2026-5684?
It affects 1 product.
Products include Tenda Cx12l Firmware.
How do I fix CVE-2026-5684?
No fix has been published for CVE-2026-5684 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-2026-5684 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5684 exists.
Other vulnerabilities in Tenda CX12L
- CVE-2026-8138 Tenda CX12L SetPptpServerCfg” formSetPPTPServer stack-based overflow
- CVE-2026-5685 Tenda CX12L addressNat fromAddressNat stack-based overflow
- CVE-2026-5686 Tenda CX12L RouteStatic fromRouteStatic stack-based overflow
- CVE-2026-5687 Tenda CX12L NatStaticSetting fromNatStaticSetting stack-based overflow
- CVE-2026-5683 Tenda CX12L P2pListFilter fromP2pListFilter stack-based overflow
Sources
Also known as GHSA-phcm-xmm8-7jpc.