Command Injection Vulnerability in Totolink A7000R Router
CVE-2026-1548

5.3MEDIUM

Key Information:

Vendor

Totolink
Status
A7000r
Vendor
CVE Published:
28 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1548?

A significant command injection vulnerability has been identified in the Totolink A7000R router, specifically within the CloudACMunualUpdateUserdata function in the /cgi-bin/cstecgi.cgi file. This flaw allows remote attackers to manipulate the 'url' parameter, potentially enabling them to execute arbitrary commands on the affected device. Given the nature of this exploit, it poses a serious risk to network security, as attackers can exploit it remotely without physical access to the router.

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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-2026-1548 - Proof of Concept

CVE-2026-1548 - Proof of Concept

References

https://vuldb.com/?id.343232
vdb-entrytechnical-description
https://vuldb.com/?ctiid.343232
signaturepermissions-required
https://vuldb.com/?submit.739715
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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