CVE-2026-31165 — MEDIUM (6.5)

Vulnerability Description

An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbitrary commands via the pppoeServiceName parameter to /cgi-bin/cstecgi.cgi.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Totolink	A3300R Firmware	17.0.0cu.557_b20221024
Totolink	A3300R	-

Related Weaknesses (CWE)

CWE-77

References

https://github.com/Svigo-o/TOTOLINK-Vul/tree/main/totolink-a3300r-pppoe-service-ExploitThird Party Advisory
https://github.com/Svigo-o/TOTOLINK-Vul/tree/main/totolink-a3300r-pppoe-service-ExploitThird Party Advisory

FAQ

What is CVE-2026-31165?

CVE-2026-31165 is a vulnerability with a CVSS score of 6.5 (MEDIUM). An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbitrary commands via the pppoeServiceName parameter to /cgi-bin/cstecgi.cgi.

How severe is CVE-2026-31165?

CVE-2026-31165 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-31165?

Check the references section above for vendor advisories and patch information. Affected products include: Totolink A3300R Firmware, Totolink A3300R.