Remote Null Pointer Dereference in TOTOLINK EX1200L Router
CVE-2026-75013

7.1HIGH

Key Information:

Vendor

Totolink
Status
Ex1200l
Vendor
CVE Published:
17 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-75013?

A vulnerability in the TOTOLINK EX1200L router, specifically in the function setWizardCfg of the cstecgi.cgi file, allows for a null pointer dereference. This security flaw can be exploited remotely, leading to potential system instability or unauthorized access. Given that exploit code is publicly available, users of the affected firmware version 9.3.5u.6146_B20201023 should take immediate action to secure their devices.

Affected Version(s)

EX1200L 9.3.5u.6146_B20201023

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-2026-75013 - Proof of Concept

References

https://vuldb.com/vuln/391273
vdb-entrytechnical-description
https://vuldb.com/vuln/391273/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-75013
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
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

yuxin_wang (VulDB User)
.