OS Command Injection in Totolink CA750-PoE by Totolink
CVE-2026-9531

5.3MEDIUM

Key Information:

Vendor

Totolink
Status
Ca750-poe
Vendor
CVE Published:
26 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9531?

A vulnerability has been identified in the Totolink CA750-PoE 6.2c.510, specifically within the setUpgradeUboot function of the /cgi-bin/cstecgi.cgi file. This security flaw allows for remote command injection due to inadequate input validation on the FileName argument. Attackers can exploit this weakness to execute arbitrary commands on the affected device, potentially leading to unauthorized access and system control. Awareness of this vulnerability is crucial for proactive security measures.

Affected Version(s)

CA750-PoE 6.2c.510

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-2026-9531 - Proof of Concept

References

https://vuldb.com/vuln/365558
vdb-entrytechnical-description
https://vuldb.com/vuln/365558/cti
signaturepermissions-required
https://vuldb.com/submit/813929
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

Buoy_yes (VulDB User)
.