Buffer Overflow Vulnerability in Totolink NR1800X by Totolink
CVE-2026-1328

8.7HIGH

Key Information:

Vendor

Totolink
Status
Nr1800x
Vendor
CVE Published:
22 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1328?

A vulnerability has been discovered in the Totolink NR1800X router, specifically affecting version 9.1.0u.6279_B20210910. This flaw is located in the 'setWizardCfg' function within the POST Request Handler of the /cgi-bin/cstecgi.cgi file. Attackers can exploit this weakness by manipulating the 'ssid' parameter, leading to a buffer overflow condition. The exploit is publicly available, which poses a significant risk as the attack can be initiated remotely.

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-2026-1328 - Proof of Concept

References

https://vuldb.com/?id.342304
vdb-entrytechnical-description
https://vuldb.com/?ctiid.342304
signaturepermissions-required
https://vuldb.com/?submit.735792
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
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

yhryhryhr_mie (VulDB User)
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