CVE-2025-59033

Driver blocklist bypass via qualified signer rules

Published Sep 8, 2025 · Updated Nov 17, 2025

Protection bypass in Microsoft Windows 10 through Server 2025 allows attackers to load drivers that qualified blocklist rules should deny. A WDAC rule combining a signer's TBS certificate hash with FileAttribRef qualifiers fails to block the matching signed driver. Exploitation requires a local driver-loading path; Microsoft disputes the CVE and states that the blocklist is intended for HVCI use.

CVSS severity7.4
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Protection bypass in Microsoft Windows 10 through Server 2025 allows attackers to load drivers that qualified blocklist rules should deny. A WDAC rule combining a signer's TBS certificate hash with FileAttribRef qualifiers fails to block the matching signed driver. Exploitation requires a local driver-loading path; Microsoft disputes the CVE and states that the blocklist is intended for HVCI use.

The record

CVE
CVE-2025-59033
Published
Sep 8, 2025
Updated
Nov 17, 2025
Vendor
Microsoft
Product
Windows
Classifications
CWE-693, CWE-420, T1562.001
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10 <=Server 2025

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Microsoft · Windowsversion=10 <=Server 2025

Published CVSS scores

7.4MITRE CNACVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.7CISA ADPCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-693Protection Mechanism Failure
CWE-420Unprotected Alternate Channel
T1562.001Impair Defenses

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo