CVE-2026-6155 | A weakness has been identified in Totolink A7100RU 7.4cu.231… | CVSS 9.8 CRITICAL

Description

A weakness has been identified in Totolink A7100RU 7.4cu.2313. The impacted element is the function setWanCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument pppoeServiceName 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-2026-6155
State: PUBLISHED
Assigner: VulDB
Reserved: 2026-04-12 18:06 UTC
Published: 2026-04-13 03:15 UTC
Last updated: 2026-04-14 16:29 UTC
Primary CWE: CWE-78
OS Command Injection
Vendor / Product: Totolink / A7100RU
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	A7100RU	—	7.4cu.2313

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-357035 | Totolink A7100RU CGI cstecgi.cgi setWanCfg os command injection https://vuldb.com/vuln/357035
VDB-357035 | CTI Indicators (IOB, IOC, TTP, IOA) https://vuldb.com/vuln/357035/cti
Submit #793679 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection https://vuldb.com/submit/793679
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_196/README.md
https://www.totolink.net/