Command Injection Vulnerability in TOTOLINK WA300 by TOTOLINK
CVE-2026-0641

5.3MEDIUM

Key Information:

Vendor

Totolink
Status
Wa300
Vendor
CVE Published:
6 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-0641?

A security vulnerability has been found in the TOTOLINK WA300 router, specifically in the sub_401510 function of the cstecgi.cgi file. This vulnerability allows an attacker to manipulate the input argument UPLOAD_FILENAME, potentially leading to command injection attacks. Since the exploit can be initiated remotely, it poses a significant risk to devices running the affected version. It has been publicly disclosed, making it crucial for users to be aware and take necessary precautions to safeguard their networks.

Affected Version(s)

WA300 5.2cu.7112_B20190227

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-2026-0641 - Proof of Concept

References

https://vuldb.com/?id.339684
vdb-entrytechnical-description
https://vuldb.com/?ctiid.339684
signaturepermissions-required
https://vuldb.com/?submit.732234
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

JackWesley (VulDB User)
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