CVE-2026-24111 Memory corruption in n/a

Critical 9.8 Published 2 Mar 2026 Updated 5 Mar 2026

Attackers can trigger a buffer overflow in the Tenda W20E router via the userInfo parameter, potentially leading to code execution or service disruption.

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-2026-24111?

CVE-2026-24111 is a critical memory corruption vulnerability in n/a, published on 2 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may exploit the vulnerability by specifying the value of `userInfo`. When `userInfo` is passed into the `addAuthUser` function and processed by `sscanf` without size validation, it could lead to buffer overflow.

Weakness: CWE-120

Which versions are affected by CVE-2026-24111?

It affects 1 product.

Products include Tenda W20e Firmware.

How do I fix CVE-2026-24111?

No fix has been published for CVE-2026-24111 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-2026-24111 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-24111 exists.

Sources

Also known as GHSA-h4gj-g96p-mj65.