OS Command Injection Vulnerability in Totolink A7100RU Router
CVE-2026-5997

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
A7100ru
Vendor
CVE Published:
10 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5997?

A security flaw has been identified in the Totolink A7100RU router, specifically within the CGI Handler component. This vulnerability allows an attacker to manipulate the 'admpass' argument in the 'setLoginPasswordCfg' function, leading to OS command injection. The exploit is remote and can potentially be leveraged by malicious actors to execute commands on the affected device. With the exploit now publicly available, it’s crucial for users to assess their systems and apply necessary patches to mitigate risks.

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-2026-5997 - Proof of Concept

References

https://vuldb.com/vuln/356551
vdb-entrytechnical-description
https://vuldb.com/vuln/356551/cti
signaturepermissions-required
https://vuldb.com/submit/792045
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)
.