CVE-2026-9404

CRITICAL

Totolink A8000RU Web Management cstecgi.cgi setDdnsCfg os command injection

Title source: cna

Description

A vulnerability was identified in Totolink A8000RU 7.1cu.643_b20200521. This affects the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Such manipulation of the argument provider leads to os command injection. The attack may be launched remotely. The exploit is publicly available and might be used.

References (5)

Core 5

Core References

Vdb Entry, Technical Description vdb-entry technical-description

VDB-365385 | Totolink A8000RU Web Management cstecgi.cgi setDdnsCfg os command injection

https://vuldb.com/vuln/365385

Signature, Permissions Required signature permissions-required

VDB-365385 | CTI Indicators (IOB, IOC, TTP, IOA)

https://vuldb.com/vuln/365385/cti

Third Party Advisory third-party-advisory

Submit #813439 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection

https://vuldb.com/submit/813439

Exploit exploit

https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_336/README.md

View Exploit ZIP pw:eip

Product product

https://www.totolink.net/

Scores

CVSS v3 9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

Details

CWE

CWE-77 CWE-78

Status published

Products (1)

Totolink/A8000RU 7.1cu.643_b20200521

Published May 24, 2026

Tracked Since May 25, 2026