CVE-2025-12241: a3300r Buffer Overflow — Exploit

Description

A vulnerability was detected in TOTOLINK A3300R 17.0.0cu.557_B20221024. This impacts the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi of the component POST Parameter Handler. The manipulation of the argument lang results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is now 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
totolink	a3300r_firmware	All
totolink	a3300r	All

References

Exploits

https://github.com/noahze01/IoT-vulnerable/blob/main/TOTOLink/A3300R/setLanguageCfg.md

Other References

https://vuldb.com/?ctiid.329911 https://vuldb.com/?id.329911 https://vuldb.com/?submit.673723 https://www.totolink.net/

Frequently Asked Questions

What is CVE-2025-12241? +

A vulnerability was detected in TOTOLINK A3300R 17.0.0cu.557_B20221024. This impacts the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi of the component POST Parameter Handler. The manipulation of the argument lang results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is now public and may be used. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-12241? +

CVE-2025-12241 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-2025-12241? +

CVE-2025-12241 affects products from totolink, specifically: a3300r, a3300r_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-12241? +

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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