Chengdu Qilu Technology Ludashi Message Dispatch ProtectFilter64.sys MessageNotifyCallback authorization

published 2026-09-13 57 d ago modified 2026-09-15 54 d ago also EUVD-2026-76981

cvss: 3.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits: 0; none known

A security flaw has been discovered in Chengdu Qilu Technology Ludashi 6.1026.4715.714. Affected by this vulnerability is the function MessageNotifyCallback in the library ProtectFilter64.sys of the component Message Dispatch Handler. Performing a manipulation results in missing authorization. Attacking locally is a requirement. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 54 d ago (2026-09-15)

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

gist.github.com https://gist.github.com/lzty/fc5f336dca4c287ab4c22168b6dc8ec2 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	4.6	CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
CNA	3.1	3.4	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:R
CNA	3.0	3.4	CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:R
CNA	2.0	2.9	AV:L/AC:L/Au:M/C:N/I:P/A:P/E:POC/RL:ND/RC:UR
CNA	4.0	1.8	CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	3.4	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
CNA	2.0	2.9	AV:L/AC:L/Au:M/C:N/I:P/A:P

Affected products

Chengdu Qilu Technology Ludashi

Classification

Weakness

CWE-862 Missing Authorization
CWE-863 Incorrect Authorization

References

gist.github.com /lzty/fc5f336dca4c287ab4c22168b6dc8ec2
exploit
vuldb.com /vuln/403096
vdb-entry, technical-description
vuldb.com /vuln/403096/cti
signature, permissions-required
vuldb.com /cve/CVE-2026-90508
third-party-advisory
vuldb.com /submit/895271
third-party-advisory

Sources

CVE List CVE-2026-90508
NVD CVE-2026-90508

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary