CVE-2023-0782 Tenda AC23 httpd formGetSysToolDDNS out-of-bounds write

High 7.2 Published 11 Feb 2023 Updated 24 Mar 2025

Remote attackers can trigger an out-of-bounds write in the Tenda AC23 router's httpd service, potentially leading to arbitrary code execution.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-0782?

CVE-2023-0782 is a high-severity memory corruption vulnerability in Tenda AC23, published on 11 Feb 2023. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

A vulnerability was found in Tenda AC23 16.03.07.45 and classified as critical. Affected by this issue is the function formSetSysToolDDNS/formGetSysToolDDNS of the file /bin/httpd. The manipulation leads to out-of-bounds write. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-220640.

Weakness: CWE-787

Which versions are affected by CVE-2023-0782?

It affects 1 product.

Products include Tenda Ac23 Firmware.

How do I fix CVE-2023-0782?

No fix has been published for CVE-2023-0782 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-2023-0782 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0782 exists.

Sources

Also known as GHSA-mjgf-fjmw-jf84.