CVE-2026-5850 | A vulnerability was identified in Totolink A7100RU 7.4cu.231… | CVSS 9.8 CRITICAL

Description

A vulnerability was identified in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setVpnPassCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument pptpPassThru leads to os command injection. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.

Metadata

CVE ID: CVE-2026-5850
State: PUBLISHED
Assigner: VulDB
Reserved: 2026-04-08 19:19 UTC
Published: 2026-04-09 05:45 UTC
Last updated: 2026-04-13 20:00 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_b20191024

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-356376 | Totolink A7100RU CGI cstecgi.cgi setVpnPassCfg os command injection https://vuldb.com/vuln/356376
VDB-356376 | CTI Indicators (IOB, IOC, TTP, IOA) https://vuldb.com/vuln/356376/cti
Submit #791266 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection https://vuldb.com/submit/791266
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_156/README.md
https://www.totolink.net/