CVE-2025-9935: TOTOLINK N600R cstecgi.cgi sub_4159F8 command injection

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-09-04 · updated 2026-06-17
Weakness: CWE-74

Description

A vulnerability was determined in TOTOLINK N600R 4.3.0cu.7866_B20220506. This vulnerability affects the function sub_4159F8 of the file /web_cste/cgi-bin/cstecgi.cgi. Executing manipulation can lead to command injection. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized.

Affected products

TOTOLINK N600R: 4.3.0cu.7866_b20220506

References

https://github.com/mono7s/TOTOLINK/blob/main/N600R/TOTOLINK%20N600R%20Unauthorized_Command_Injection.md
https://vuldb.com/?ctiid.322337
https://vuldb.com/?id.322337
https://vuldb.com/?submit.643088
https://www.totolink.net/

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