Command Injection Vulnerability in Totolink NR1800X Router
CVE-2026-1326

5.3MEDIUM

Key Information:

Vendor

Totolink
Status
Nr1800x
Vendor
CVE Published:
22 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1326?

A vulnerability has been discovered in the Totolink NR1800X router, specifically within the setWanCfg function located in the /cgi-bin/cstecgi.cgi file. This issue allows for command injection through improper handling of the Hostname parameter, enabling remote attackers to execute malicious commands. The exploit is publicly available, which raises significant security concerns for users running the affected firmware version. It is strongly advised to update to the latest firmware to mitigate this risk.

Affected Version(s)

NR1800X 9.1.0u.6279_B20210910

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-2026-1326 - Proof of Concept

References

https://vuldb.com/?id.342302
vdb-entrytechnical-description
https://vuldb.com/?ctiid.342302
signaturepermissions-required
https://vuldb.com/?submit.735787
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

yhryhryhr_tu (VulDB User)
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