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Vulnerability record · CVE-2025-4850 · published 18 May 2025

CVE-2025-4850: Totolink n300rh firmware injection vulnerability

TTotolink · N300rh Firmware

A vulnerability classified as critical has been found in TOTOLINK N300RH 6.1c.1390_B20191101. This affects the function setUnloadUserData of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument plugin_name leads to command injection. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

5.3 CVSS 4.0 Medium EPSS 1.2% · top 33.3% CWE-74 · InjectionCWE-77 · Command injection
5.3CVSS 4.0 base score, v2 6.5
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
17 Jun 2026Last modified by NVD

Description

A vulnerability classified as critical has been found in TOTOLINK N300RH 6.1c.1390_B20191101. This affects the function setUnloadUserData of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument plugin_name leads to command injection. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/CH13hh/tmp_store_cc/blob/main/tt/ta/m2.md Broken Link
https://vuldb.com/?ctiid.309321 Permissions RequiredVDB Entry
https://vuldb.com/?id.309321 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.575073 Third Party AdvisoryVDB Entry
https://www.totolink.net/ Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-4850), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.