CVE-2025-13446: ac21 Buffer Overflow — Exploit

Description

A vulnerability has been found in Tenda AC21 16.03.08.16. This vulnerability affects unknown code of the file /goform/SetSysTimeCfg. The manipulation of the argument timeZone/time leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-119 Buffer Overflow

CWE-121 CWE-121

Affected Products

Vendor	Product	Versions
tenda	ac21_firmware	All
tenda	ac21	All

References

Exploits

https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN8.md https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN9.md https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN8.md https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN9.md

Other References

https://vuldb.com/?ctiid.333018 https://vuldb.com/?id.333018 https://vuldb.com/?submit.694425 https://vuldb.com/?submit.694430 https://www.tenda.com.cn/

Frequently Asked Questions

What is CVE-2025-13446? +

A vulnerability has been found in Tenda AC21 16.03.08.16. This vulnerability affects unknown code of the file /goform/SetSysTimeCfg. The manipulation of the argument timeZone/time leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-13446? +

CVE-2025-13446 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-13446? +

CVE-2025-13446 affects products from tenda, specifically: ac21, ac21_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-13446? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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