CVE-2025-28221 Memory corruption in n/a

High 7.5 Published 28 Mar 2025 Updated 21 Apr 2025

Remote attackers can crash the web server of Tenda W6_S routers by triggering a buffer overflow in the set_local_time function via a POST request.

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-2025-28221?

CVE-2025-28221 is a high-severity memory corruption vulnerability in n/a, published on 28 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Tenda W6_S v1.0.0.4_510 has a Buffer Overflow vulnerability in the set_local_time function, which allows remote attackers to cause web server crash via parameter time passed to the binary through a POST request.

Weakness: CWE-120

Which versions are affected by CVE-2025-28221?

It affects 1 product.

Products include Tenda W6-S Firmware.

How do I fix CVE-2025-28221?

No fix has been published for CVE-2025-28221 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-2025-28221 being exploited?

There is no known exploitation of CVE-2025-28221 in the wild and no public exploit code.

Sources

Also known as GHSA-rq3r-6rf7-m7m9.