OS Command Injection in Totolink A7100RU by Totolink
CVE-2026-5850

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
A7100ru
Vendor
CVE Published:
9 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5850?

A vulnerability exists in the Totolink A7100RU router, specifically within the CGI Handler's setVpnPassCfg function. This flaw allows an attacker to manipulate the pptpPassThru parameter, potentially leading to OS command injection. Remote exploitation is feasible, making this a significant security concern as publicly available exploit methods can be utilized by malicious actors. Users are urged to implement security measures to safeguard against unauthorized access.

Affected Version(s)

A7100RU 7.4cu.2313_b20191024

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-5850 - Proof of Concept

References

https://vuldb.com/vuln/356376
vdb-entrytechnical-description
https://vuldb.com/vuln/356376/cti
signaturepermissions-required
https://vuldb.com/submit/791266
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

LtzHust2 (VulDB User)
.