Critical severity · published Sep 3, 2025
CVE-2025-9935
TOTOLINK N600R cstecgi.cgi sub_4159F8 command injection
9.8
CVSS
2.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.7% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N6
N600R · TOTOLINK
4.3.0cu.7866_B20220506 · source: vendor
NF
N600r Firmware · Totolink
4.3.0cu.7866_b20220506 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-9935
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-9935
Exploit
https://github.com/mono7s/TOTOLINK/blob/main/N600R/TOTOLINK%20N600R%20Unauthorized_Command_Injection.md
Permissions Required
https://vuldb.com/?ctiid.322337
Third Party Advisory
https://vuldb.com/?id.322337
Third Party Advisory
https://vuldb.com/?submit.643088
Product
https://www.totolink.net/
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