CVE-2025-4849: TOTOLINK N300RH cstecgi.cgi CloudACMunualUpdateUserdata 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 was found in TOTOLINK N300RH 6.1c.1390_B20191101. It has been rated as critical. Affected by this issue is the function CloudACMunualUpdateUserdata of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument url leads to command injection. The attack may be launched 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/m1.md
https://vuldb.com/?ctiid.309320
https://vuldb.com/?id.309320
https://vuldb.com/?submit.575072
https://www.totolink.net/

Get alerted when CVE-2025-4849 or the next vulnerability affects your stack