CVE-2025-4269: a720r Access Control Flaw — Exploit

Description

A vulnerability was found in TOTOLINK A720R 4.1.5cu.374 and classified as critical. This issue affects some unknown processing of the file /cgi-bin/cstecgi.cgi of the component Log Handler. The manipulation of the argument topicurl with the input clearDiagnosisLog/clearSyslog/clearTracerouteLog leads to improper access controls. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

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CVSS v3.1 Score

6.5

MEDIUM

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

Weakness Type (CWE)

CWE-266 CWE-266

CWE-284 CWE-284

Affected Products

Vendor	Product	Versions
totolink	a720r_firmware	All
totolink	a720r	All

References

Exploits

https://github.com/at0de/my_vulns/blob/main/TOTOLINK/A720R/clearDiagnosisLog.md https://github.com/at0de/my_vulns/blob/main/TOTOLINK/A720R/clearSyslog.md

Other References

https://vuldb.com/?ctiid.307373 https://vuldb.com/?id.307373 https://vuldb.com/?submit.563430 https://www.totolink.net/

Frequently Asked Questions

What is CVE-2025-4269? +

A vulnerability was found in TOTOLINK A720R 4.1.5cu.374 and classified as critical. This issue affects some unknown processing of the file /cgi-bin/cstecgi.cgi of the component Log Handler. The manipulation of the argument topicurl with the input clearDiagnosisLog/clearSyslog/clearTracerouteLog leads to improper access controls. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-4269? +

CVE-2025-4269 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-4269? +

CVE-2025-4269 affects products from totolink, specifically: a720r, a720r_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-4269? +

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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