CVE-2026-9407 | A security vulnerability has been detected in Totolink A8000… | CVSS 9.8 CRITICAL

Description

A security vulnerability has been detected in Totolink A8000RU 7.1cu.643_b20200521. Affected by this vulnerability is the function setFirewallType of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. The manipulation of the argument firewallType leads to os command injection. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used.

Metadata

CVE ID: CVE-2026-9407
State: PUBLISHED
Assigner: VulDB
Reserved: 2026-05-24 06:27 UTC
Published: 2026-05-24 23:45 UTC
Last updated: 2026-05-26 13:22 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-365388 | Totolink A8000RU Web Management cstecgi.cgi setFirewallType os command injection https://vuldb.com/vuln/365388
VDB-365388 | CTI Indicators (IOB, IOC, TTP, IOA) https://vuldb.com/vuln/365388/cti
Submit #813442 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection https://vuldb.com/submit/813442
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_339/README.md
https://www.totolink.net/