OnlyFm252
Windows NTLM

CVE-2025-53778 — Windows NTLM Elevation of Privilege Vulnerability

Critical CVSS 8.8 EPSS 0.36074 2025-08 archive

Executive Summary

Improper authentication in Windows NTLM allows an authorized attacker to elevate privileges over a network.

Overview

8.8
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
More Likely
MS Exploit Likelihood
Category Elevation of Privilege
Released Aug 12 2025
Last Updated Aug 12 2025
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.36074 — 0.9827 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

0.36074
probability of exploitation in the next 30 days
0.9827 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

25 affected products
Product KB Article Severity Impact Restart Required
Windows 10 for 32-bit Systems 5063889 (SecurityUpdate) Critical Elevation of Privilege Yes
Windows 10 for x64-based Systems 5063889 (SecurityUpdate) Critical Elevation of Privilege Yes
Windows 10 Version 1607 for 32-bit Systems 5063871 (Security Update) Critical Elevation of Privilege Yes
Windows 10 Version 1607 for x64-based Systems 5063871 (Security Update) Critical Elevation of Privilege Yes
Windows 10 Version 1809 for 32-bit Systems 5063877 (Security Update) Critical Elevation of Privilege Yes
Windows 10 Version 1809 for x64-based Systems 5063877 (Security Update) Critical Elevation of Privilege Yes
Windows 10 Version 21H2 for 32-bit Systems 5063709 (SecurityUpdate) Critical Elevation of Privilege Yes
Windows 10 Version 21H2 for ARM64-based Systems 5063709 (SecurityUpdate) Critical Elevation of Privilege Yes
Windows 10 Version 21H2 for x64-based Systems 5063709 (SecurityUpdate) Critical Elevation of Privilege Yes
Windows 10 Version 22H2 for 32-bit Systems 5063709 (SecurityUpdate) Critical Elevation of Privilege Yes
Windows 10 Version 22H2 for ARM64-based Systems 5063709 (SecurityUpdate) Critical Elevation of Privilege Yes
Windows 10 Version 22H2 for x64-based Systems 5063709 (SecurityUpdate) Critical Elevation of Privilege Yes
Windows 11 Version 22H2 for ARM64-based Systems 5063875 (Security Update) Critical Elevation of Privilege Yes
Windows 11 Version 22H2 for x64-based Systems 5063875 (Security Update) Critical Elevation of Privilege Yes
Windows 11 Version 23H2 for ARM64-based Systems 5063875 (Security Update) Critical Elevation of Privilege Yes
Windows 11 Version 23H2 for x64-based Systems 5063875 (Security Update) Critical Elevation of Privilege Yes
Windows 11 Version 24H2 for ARM64-based Systems 5063878 (Security Update) 5064010 (SecurityHotpatchUpdate) Critical Elevation of Privilege 5062553 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 10.0.26100.4946 10.0.26100.4851 Yes None Windows 11 Version 24H2 for x64-based Systems 5063878 (Security Update) 5064010 (SecurityHotpatchUpdate) Critical Elevation of Privilege 5062553 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 10.0.26100.4946 10.0.26100.4851 Yes None Windows Server 2008 for 32-bit Systems Service Pack 2 5063888 (MonthlyRollup) 5063948 (SecurityOnly) Critical Elevation of Privilege 5062624 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 6.0.6003.23471 Yes None Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5063888 (MonthlyRollup) 5063948 (SecurityOnly) Critical Elevation of Privilege 5062624 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 6.0.6003.23471 Yes None Windows Server 2008 for x64-based Systems Service Pack 2 5063888 (MonthlyRollup) 5063948 (SecurityOnly) Critical Elevation of Privilege 5062624 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 6.0.6003.23471 Yes None Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5063888 (MonthlyRollup) 5063948 (SecurityOnly) Critical Elevation of Privilege 5062624 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 6.0.6003.23471 Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 5063947 (MonthlyRollup) 5063927 (SecurityOnly) Critical Elevation of Privilege 5062632 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 6.1.7601.27872 Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5063947 (MonthlyRollup) 5063927 (SecurityOnly) Critical Elevation of Privilege 5062632 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 6.1.7601.27872 Yes None Windows Server 2012 5063906 (MonthlyRollup) Critical Elevation of Privilege Yes
Windows Server 2012 (Server Core installation) 5063906 (MonthlyRollup) Critical Elevation of Privilege Yes
Windows Server 2012 R2 5063950 (MonthlyRollup) Critical Elevation of Privilege Yes
Windows Server 2012 R2 (Server Core installation) 5063950 (MonthlyRollup) Critical Elevation of Privilege Yes
Windows Server 2016 5063871 (Security Update) Critical Elevation of Privilege Yes
Windows Server 2016 (Server Core installation) 5063871 (Security Update) Critical Elevation of Privilege Yes
Windows Server 2019 5063877 (Security Update) Critical Elevation of Privilege Yes
Windows Server 2019 (Server Core installation) 5063877 (Security Update) Critical Elevation of Privilege Yes
Windows Server 2022 5063880 (SecurityUpdate) 5063812 (SecurityHotpatchUpdate) Critical Elevation of Privilege 5062572 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 10.0.20348.4052 10.0.20348.3989 Yes None Windows Server 2022 (Server Core installation) 5063880 (SecurityUpdate) 5063812 (SecurityHotpatchUpdate) Critical Elevation of Privilege 5062572 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 10.0.20348.4052 10.0.20348.3989 Yes None Windows Server 2022, 23H2 Edition (Server Core installation) 5063899 (SecurityUpdate) Critical Elevation of Privilege Yes

Patches

8 patches
Article Type Restart
5063889 SecurityUpdate Yes
5063871 Security Update Yes
5063877 Security Update Yes
5063709 SecurityUpdate Yes
5063875 Security Update Yes
5063906 MonthlyRollup Yes
5063950 MonthlyRollup Yes
5063899 SecurityUpdate Yes

Known Exploits

Acknowledgments

Tianze Ding (@D1iv3)

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