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Windows Active Directory Certificate Services

CVE-2025-27740 — Active Directory Certificate Services Elevation of Privilege Vulnerability

Important CVSS 8.8 EPSS 0.02865 2025-04 archive

Executive Summary

Weak authentication in Windows Active Directory Certificate Services allows an authorized attacker to elevate privileges over a network.

Overview

8.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Elevation of Privilege
Released Apr 8 2025
Last Updated Apr 8 2025
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.02865 — 0.84955 percentile
NVD CVSS 8.8 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.7

EPSS Score

0.02865
probability of exploitation in the next 30 days
0.84955 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

13 affected products
Product KB Article Severity Impact Restart Required
Windows Server 2008 for 32-bit Systems Service Pack 2 5055609 (Monthly Rollup) 5055596 (Security Only) Important Elevation of Privilege 5053888 Base: 8.8 Temporal: 7.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.23220 Yes None Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5055609 (Monthly Rollup) 5055596 (Security Only) Important Elevation of Privilege 5053888 Base: 8.8 Temporal: 7.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.23220 Yes None Windows Server 2008 for x64-based Systems Service Pack 2 5055609 (Monthly Rollup) 5055596 (Security Only) Important Elevation of Privilege 5053888 Base: 8.8 Temporal: 7.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.23220 Yes None Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5055609 (Monthly Rollup) 5055596 (Security Only) Important Elevation of Privilege 5053888 Base: 8.8 Temporal: 7.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.23220 Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 5055561 (Monthly Rollup) 5055570 (Security Only) Important Elevation of Privilege 5053620 Base: 8.8 Temporal: 7.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.1.7601.27670 Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5055561 (Monthly Rollup) 5055570 (Security Only) Important Elevation of Privilege 5053620 Base: 8.8 Temporal: 7.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.1.7601.27670 Yes None Windows Server 2012 5055581 (Monthly Rollup) Important Elevation of Privilege Yes
Windows Server 2012 (Server Core installation) 5055581 (Monthly Rollup) Important Elevation of Privilege Yes
Windows Server 2012 R2 5055557 (Monthly Rollup) Important Elevation of Privilege Yes
Windows Server 2012 R2 (Server Core installation) 5055557 (Monthly Rollup) Important Elevation of Privilege Yes
Windows Server 2016 5055521 (Security Update) Important Elevation of Privilege Yes
Windows Server 2016 (Server Core installation) 5055521 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 5055519 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 (Server Core installation) 5055519 (Security Update) Important Elevation of Privilege Yes
Windows Server 2022 5055526 (Security Update) Important Elevation of Privilege Yes
Windows Server 2022 (Server Core installation) 5055526 (Security Update) Important Elevation of Privilege Yes
Windows Server 2022, 23H2 Edition (Server Core installation) 5055527 (Security Update) Important Elevation of Privilege Yes
Windows Server 2025 5055523 (Security Update) Important Elevation of Privilege Yes
Windows Server 2025 (Server Core installation) 5055523 (Security Update) Important Elevation of Privilege Yes

Patches

7 patches
Article Type Restart
5055581 Monthly Rollup Yes
5055557 Monthly Rollup Yes
5055521 Security Update Yes
5055519 Security Update Yes
5055526 Security Update Yes
5055527 Security Update Yes
5055523 Security Update Yes

Known Exploits

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