Buffer Overflow in TOTOLINK CA300-PoE Wireless Repeater Configuration
CVE-2026-124058

9.4CRITICAL

Key Information:

Vendor

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-124058?

A buffer overflow vulnerability exists in the 'setWiFiRepeaterConfig' function of the TOTOLINK CA300-PoE firmware version 6.2c.884. An adversary could exploit this flaw by manipulating the 'ApCliKeyStr' argument, potentially leading to unauthorized access or control over the device. This issue is accessible over the network, making it a target for external attacks. Publicly available exploit details heighten the risk, emphasizing the urgency for users to review and update their device firmware.

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-2026-124058 - Proof of Concept

References

https://vuldb.com/vuln/432113
vdb-entrytechnical-description
https://vuldb.com/vuln/432113/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-124058
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)
.