PT-2025-21826 · Totolink · Totolink N300Rt

Daddyshark · Published 2025-05-18 · Updated 2025-05-20 · CVE-2025-4851

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions TOTOLINK N300RH version 6.1c.1390 B20191101

Description A critical vulnerability was found in the function setUploadUserData of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName leads to command injection. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Recommendations As a temporary workaround, consider disabling the setUploadUserData function until a patch is available. Restrict access to the /cgi-bin/cstecgi.cgi file to minimize the risk of exploitation. Avoid using the FileName argument in the affected API endpoint until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Special Elements Injection

Command Injection

Weakness Enumeration

CWE-74

CWE-77

Related Identifiers

BDU:2025-05838

CVE-2025-4851

Affected Products

Totolink N300Rt

References · 13

• 🔥 https://github.com/CH13hh/tmp_store_cc/blob/main/tt/ta/m3.md · Exploit
• https://bdu.fstec.ru/vul/2025-05838 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-4851 · Security Note
• https://osv.dev/vulnerability/CVE-2025-4851 · Vendor Advisory
• https://vuldb.com/?ctiid.309322 · Note
• https://t.me/cvetracker/24133 · Telegram Post
• https://vuldb.com/?submit.575074 · Note
• https://twitter.com/VulmonFeeds/status/1923962622119936074 · Twitter Post
• https://totolink.net · Note
• https://t.me/cvenotify/122793 · Telegram Post
• https://twitter.com/CVEnew/status/1923947750489719032 · Twitter Post
• https://vuldb.com/?id.309322 · Note
• https://twitter.com/SecAideInfo/status/1924771173654790396 · Twitter Post