Null Pointer Dereference in TOTOLINK WA1200 Affecting HTTP Request Handler
CVE-2026-0731

6.9MEDIUM

Key Information:

Vendor

Totolink
Status
Wa1200
Vendor
CVE Published:
8 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-0731?

The TOTOLINK WA1200 version 5.9c.2914 contains a vulnerability in the HTTP Request Handler component, specifically within the cstecgi.cgi file. This issue allows for a null pointer dereference due to improper handling of requests, which can potentially be exploited by attackers remotely. The vulnerability has been publicly disclosed, increasing the risk of exploitation in the wild. Users of the affected version should take immediate action to mitigate potential threats.

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Affected Version(s)

WA1200 5.9c.2914

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-2026-0731 - Proof of Concept

References

https://vuldb.com/?id.340128
vdb-entry
https://vuldb.com/?ctiid.340128
signaturepermissions-required
https://vuldb.com/?submit.733249
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
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

JackWesley (VulDB User)
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