Command Injection Vulnerability in Totolink A7000R Router
CVE-2026-1623

5.3MEDIUM

Key Information:

Vendor

Totolink
Status
A7000r
Vendor
CVE Published:
29 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1623?

A command injection vulnerability has been identified in the Totolink A7000R router, specifically affecting the setUpgradeFW function within the /cgi-bin/cstecgi.cgi file. This weakness allows an attacker to manipulate the FileName parameter, enabling remote execution of arbitrary commands. Given that this exploit has been publicly disclosed, it presents a significant risk to affected devices, necessitating immediate attention and remediation to safeguard against potential unauthorized access.

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Affected Version(s)

A7000R 4.1cu.4154

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-2026-1623 - Proof of Concept

CVE-2026-1623 - Proof of Concept

References

https://vuldb.com/?id.343382
vdb-entrytechnical-description
https://vuldb.com/?ctiid.343382
signaturepermissions-required
https://vuldb.com/?submit.740767
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

xuanyu (VulDB User)
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