Command Injection Vulnerability in Totolink A7100RU Products
CVE-2026-5993

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
A7100ru
Vendor
CVE Published:
10 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5993?

A command injection vulnerability exists in the Totolink A7100RU router's CGI Handler component, specifically in the setWiFiGuestCfg function. By manipulating the wifiOff argument within the /cgi-bin/cstecgi.cgi file, an attacker can execute arbitrary commands on the underlying operating system. This vulnerability can be exploited remotely, posing significant security risks to affected devices. Publicly available exploits further increase the urgency for users to apply necessary patches or mitigate exposures.

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-2026-5993 - Proof of Concept

References

https://vuldb.com/vuln/356547
vdb-entrytechnical-description
https://vuldb.com/vuln/356547/cti
signaturepermissions-required
https://vuldb.com/submit/792041
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

LtzHust (VulDB User)
.