CVE-2026-5548 Tenda AC10 httpd fromSysToolChangePwd stack-based overflow

High 8.7 Published 5 Apr 2026 Updated 6 Apr 2026

A remote attacker can trigger a stack-based buffer overflow in the Tenda AC10 router's httpd service via the sys.userpass argument, potentially leading to code execution.

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-2026-5548?

CVE-2026-5548 is a high-severity memory corruption vulnerability in Tenda Ac10 Firmware, published on 5 Apr 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 AC10 16.03.10.10_multi_TDE01. Affected by this vulnerability is the function fromSysToolChangePwd of the file /bin/httpd. Performing a manipulation of the argument sys.userpass results in stack-based buffer overflow. The attack can be initiated remotely.

Weakness: CWE-121, CWE-119

Which versions are affected by CVE-2026-5548?

It affects 1 product.

Products include Tenda Ac10 Firmware.

How do I fix CVE-2026-5548?

No fix has been published for CVE-2026-5548 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-2026-5548 being exploited?

There is no known exploitation of CVE-2026-5548 in the wild and no public exploit code.

All Tenda Ac10 Firmware vulnerabilities

Sources

Also known as GHSA-mf8f-5hfr-3cfm.