TI-2025-09116 Aliases CVE-2025-9935 GHSA-9f5w-jc5j-mr6j

TOTOLINK N600R cstecgi.cgi sub_4159F8 command injection

HIGH 70CWE-74Published 2025-09-03 · Updated 2025-09-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Code execution
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-77.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.02726 86th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA and NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
TOTOLINK	N600R	4.3.0cu.7866_B20220506	—	No fix listed	CNA

N600R VendorTOTOLINK Affected 4.3.0cu.7866_B20220506 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:totolink:n600r_firmware:4.3.0cu.7866_b20220506:::::::*	4.3.0cu.7866_b20220506	Vulnerable	TOTOLINK
cpe:2.3:h:totolink:n600r:-:::::::*	not specified by NVD	Running on	TOTOLINK

cpe:2.3:o:totolink:n600r_firmware:4.3.0cu.7866_b20220506:*:*:*:*:*:*:* Versions 4.3.0cu.7866_b20220506 Vulnerable ·TOTOLINK
cpe:2.3:h:totolink:n600r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-9935
2026-10-03 Alias added: GHSA-9f5w-jc5j-mr6j

References

Exploit 1

https://github.com/mono7s/TOTOLINK/blob/main/N600R/TOTOLINK%20N600R%20Unauthorized_Command_Injection.md

Other 1

https://www.totolink.net/

TI-2025-32319 TOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a command injection… CVSS 3.1CRITICAL 9.8
TI-2025-28923 Buffer Overflow vulnerability in TOTOLINK N600R v4.3.0cu.7866_B2022506 allows a remote… CVSS 3.1CRITICAL 9.8
TI-2025-10484 TOTOLINK N600R HTTP Request cstecgi.cgi setWiFiBasicConfig buffer overflow CVSS 4.0HIGH 8.7
TI-2025-04012 TOTOLINK T10/A3100R/A950RG/A800R/N600R/A3000RU/A810R cstecgi.cgi CloudACMunualUpdate buffer overflow CVSS 4.0HIGH 8.7
TI-2025-37647 A NULL pointer dereference in the main function of TOTOLINK N600R v4.3.0cu.7866_B20220506… CVSS 3.1HIGH 7.5
TI-2025-37646 TOTOLINK N600R v4.3.0cu.7866_B20220506 was discovered to contain a stack overflow in the… CVSS 3.1HIGH 7.5

See all 37 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences