CVE-2026-7136 | A weakness has been identified in Totolink A8000RU 7.1cu.643… | CVSS 9.8 CRITICAL

Description

A weakness has been identified in Totolink A8000RU 7.1cu.643_b20200521. Affected by this issue is the function setDmzCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument wanIdx can lead to os command injection. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks.

Metadata

CVE ID: CVE-2026-7136
State: PUBLISHED
Assigner: VulDB
Reserved: 2026-04-26 19:30 UTC
Published: 2026-04-27 15:30 UTC
Last updated: 2026-04-27 20:12 UTC
Primary CWE: CWE-78
OS Command Injection
Vendor / Product: Totolink / A8000RU
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Totolink	A8000RU	—	7.1cu.643_b20200521

Weakness (CWE)

CWE	Source	Description
CWE-77	cna	Command Injection
CWE-78	cna	OS Command Injection

CVSS scores (4)

Score	Severity	Version	Source	Vector
10.0	N/D	2.0	cna	AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
9.8	CRITICAL	3.1	cna	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
9.8	CRITICAL	3.0	cna	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
9.3	CRITICAL	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

References (5)

VDB-359735 | Totolink A8000RU CGI cstecgi.cgi setDmzCfg os command injection https://vuldb.com/vuln/359735
VDB-359735 | CTI Indicators (IOB, IOC, TTP, IOA) https://vuldb.com/vuln/359735/cti
Submit #801007 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection https://vuldb.com/submit/801007
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_311/README.md
https://www.totolink.net/