CVE-2025-12259: a3300r Buffer Overflow — Exploit

Description

A flaw has been found in TOTOLINK A3300R 17.0.0cu.557_B20221024. The affected element is the function setScheduleCfg of the file /cgi-bin/cstecgi.cgi of the component POST Parameter Handler. This manipulation of the argument recHour causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been published 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/setScheduleCfg.md

Other References

https://vuldb.com/?ctiid.329930 https://vuldb.com/?id.329930 https://vuldb.com/?submit.673726 https://www.totolink.net/

Frequently Asked Questions

What is CVE-2025-12259? +

A flaw has been found in TOTOLINK A3300R 17.0.0cu.557_B20221024. The affected element is the function setScheduleCfg of the file /cgi-bin/cstecgi.cgi of the component POST Parameter Handler. This manipulation of the argument recHour causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been published and may be used. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-12259? +

CVE-2025-12259 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-2025-12259? +

CVE-2025-12259 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-2025-12259? +

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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