CVE-2025-4851: TOTOLINK N300RH cstecgi.cgi setUploadUserData command injection

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-18 · updated 2026-06-17
Weakness: CWE-74

Description

A vulnerability classified as critical was found in TOTOLINK N300RH 6.1c.1390_B20191101. This vulnerability affects 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.

Affected products

Totolink N300RH: 6.1c.1390_b20191101

References

https://github.com/CH13hh/tmp_store_cc/blob/main/tt/ta/m3.md
https://vuldb.com/?ctiid.309322
https://vuldb.com/?id.309322
https://vuldb.com/?submit.575074
https://www.totolink.net/

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