Buffer Overflow Vulnerability in TOTOLINK CA300-PoE Product
CVE-2026-124060

9.4CRITICAL

Key Information:

Vendor

Totolink
Status
Ca300-poe
Vendor
CVE Published:
7 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-124060?

The TOTOLINK CA300-PoE 6.2c.884 is susceptible to a buffer overflow vulnerability in the UploadCustomModule function located in the cgi-bin/cstecgi.cgi file. An attacker can exploit this issue by manipulating the File argument, potentially allowing for remote execution of arbitrary code. Given the public availability of the exploit, it is crucial for users to update their devices and implement appropriate security measures to mitigate potential risks.

Affected Version(s)

CA300-PoE 6.2c.884

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-2026-124060 - Proof of Concept

References

https://vuldb.com/vuln/432115
vdb-entrytechnical-description
https://vuldb.com/vuln/432115/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-124060
third-party-advisory

CVSS V4

Score:
9.4
Severity:
CRITICAL
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

wxhwxhwxh_mie (VulDB User)
.