Authorization Flaw in Chengdu Qilu Technology Ludashi Software
CVE-2026-90508

4.6MEDIUM

Key Information:

Vendor

Chengdu Qilu Technology

Status
Ludashi
Vendor
CVE Published:
13 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-90508?

A security flaw has been identified in the Ludashi software from Chengdu Qilu Technology that affects the MessageNotifyCallback function within the ProtectFilter64.sys library. This vulnerability allows local attackers to exploit missing authentication controls, which could lead to unauthorized actions within the affected product. Despite prior notification to the vendor regarding this security issue, no response has been received, heightening concerns over potential exploitation in the wild.

Affected Version(s)

Ludashi 6.1026.4715.714

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-2026-90508 - Proof of Concept

References

https://vuldb.com/vuln/403096
vdb-entrytechnical-description
https://vuldb.com/vuln/403096/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90508
third-party-advisory

CVSS V4

Score:
4.6
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
Low
Attack Vector:
Local
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

Bigcat (VulDB User)
VulDB CNA Team
.