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Recorded 10 Nov 2026 at 18:32 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position. See the latest record.

CVEMicrosoft Security Response Center

Windows Active Directory Certificate Services Security Feature Bypass

Improper certificate validation in Windows Active Directory Certificate Services allows an authorized attacker to bypass a security feature over a network.

What it said

CVE
CVE-2026-105590
Severity
Important
CVSS base score
5.3
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C
Impact
Security Feature Bypass
Exploitation detected
No known exploitation (MSRC assessment)
Publicly disclosed
No (MSRC assessment)
Exploitability
Exploitation Less Likely
Component
Windows Active Directory Certificate Services
Weakness
CWE-295: Improper Certificate Validation
Issued by
Microsoft
Customer action
Required: follow the MSRC remediation guidance
Affected products
Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022 (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation)
Updates that fix it
KB5131077: Windows Server 2025, Windows Server 2025 (Server Core installation); KB5131080: Windows Server 2025, Windows Server 2025 (Server Core installation) (restart required); KB5131085: Windows Server 2019, Windows Server 2019 (Server Core installation) (restart required); KB5131090: Windows Server 2022, Windows Server 2022 (Server Core installation) (restart required); KB5131291: Windows Server 2016, Windows Server 2016 (Server Core installation) (restart required)
CISA KEV
Not listed in the collected catalog
EPSS
No EPSS score collected
Public detection template
No Nuclei template listed
Published
10 Nov 2026 08:00 UTC
Last revised
10 Nov 2026 08:00 UTC
Revision note
Information published.

Source evidence when recorded

Microsoft security releases
Complete at observationRead 10 Nov 2026 at 18:30 UTC
CISA KEV
Complete at observationRead 10 Nov 2026 at 18:30 UTC
FIRST EPSS
Complete at observationRead 10 Nov 2026 at 18:30 UTC
Public detection templates (Nuclei)
Complete at observationRead 10 Nov 2026 at 18:30 UTC

Coverage describes the sources at this observation. A complete read then does not establish their current position.

Page history

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ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 10 Nov 20:01 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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