OS Command Injection Vulnerability in Totolink A7100RU by Totolink
CVE-2026-5854

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
A7100ru
Vendor
CVE Published:
9 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5854?

A security vulnerability has been identified in the Totolink A7100RU model, specifically within the setWiFiEasyCfg function of the CGI Handler component. This flaw permits an attacker to manipulate the merge argument, facilitating an OS command injection. The exploit can be executed remotely, making it critical for users to be aware and take appropriate security measures as the exploit code has been made publicly available.

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-2026-5854 - Proof of Concept

References

https://vuldb.com/vuln/356380
vdb-entrytechnical-description
https://vuldb.com/vuln/356380/cti
signaturepermissions-required
https://vuldb.com/submit/791276
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

LtzHuster2 (VulDB User)
.