OS Command Injection Vulnerability in Totolink WA300 Router
CVE-2026-4497

6.9MEDIUM

Key Information:

Vendor

Totolink
Status
Wa300
Vendor
CVE Published:
20 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4497?

A security vulnerability has been identified in the Totolink WA300 router version V5.2cu.7112_B20190227. The issue occurs in the recvUpgradeNewFw function located within the /cgi-bin/cstecgi.cgi file, allowing for os command injection. This weakness enables attackers to execute arbitrary commands on the device from a remote location, posing threats to the confidentiality and integrity of network operations. The exploit has been publicly disclosed and is actively utilized, requiring immediate attention from users to secure their devices.

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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-2026-4497 - Proof of Concept

References

https://vuldb.com/?id.352046
vdb-entrytechnical-description
https://vuldb.com/?ctiid.352046
signaturepermissions-required
https://vuldb.com/?submit.773875
third-party-advisory

CVSS V4

Score:
6.9
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

junqi (VulDB User)
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