CVE-2026-7121 | A flaw has been found in Totolink A8000RU 7.1cu.643_b2020052… | CVSS 9.8 CRITICAL

Description

A flaw has been found in Totolink A8000RU 7.1cu.643_b20200521. This affects the function setWizardCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. This manipulation of the argument wizard causes os command injection. It is possible to initiate the attack remotely. The exploit has been published and may be used.

Metadata

CVE ID: CVE-2026-7121
State: PUBLISHED
Assigner: VulDB
Reserved: 2026-04-26 19:12 UTC
Published: 2026-04-27 11:45 UTC
Last updated: 2026-04-27 16:33 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-359720 | Totolink A8000RU CGI cstecgi.cgi setWizardCfg os command injection https://vuldb.com/vuln/359720
VDB-359720 | CTI Indicators (IOB, IOC, TTP, IOA) https://vuldb.com/vuln/359720/cti
Submit #800933 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection https://vuldb.com/submit/800933
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_306/README.md
https://www.totolink.net/