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Windows Distributed Transaction Coordinator

CVE-2025-50166 — Windows Distributed Transaction Coordinator (MSDTC) Information Disclosure Vulnerability

Important CVSS 6.5 EPSS 0.01203 2025-08 archive

Executive Summary

Integer overflow or wraparound in Windows Distributed Transaction Coordinator allows an authorized attacker to disclose information over a network.

Overview

6.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Information Disclosure
Released Aug 12 2025
Last Updated Aug 12 2025
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.01203 — 0.64227 percentile
NVD CVSS 6.5 MEDIUM — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
None
AVAILABILITY
None
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 5.7

EPSS Score

0.01203
probability of exploitation in the next 30 days
0.64227 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) Important Information Disclosure Yes
Windows 10 for x64-based Systems 5063889 (SecurityUpdate) Important Information Disclosure Yes
Windows 10 Version 1607 for 32-bit Systems 5063871 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1607 for x64-based Systems 5063871 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1809 for 32-bit Systems 5063877 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1809 for x64-based Systems 5063877 (Security Update) Important Information Disclosure Yes
Windows 10 Version 21H2 for 32-bit Systems 5063709 (SecurityUpdate) Important Information Disclosure Yes
Windows 10 Version 21H2 for ARM64-based Systems 5063709 (SecurityUpdate) Important Information Disclosure Yes
Windows 10 Version 21H2 for x64-based Systems 5063709 (SecurityUpdate) Important Information Disclosure Yes
Windows 10 Version 22H2 for 32-bit Systems 5063709 (SecurityUpdate) Important Information Disclosure Yes
Windows 10 Version 22H2 for ARM64-based Systems 5063709 (SecurityUpdate) Important Information Disclosure Yes
Windows 10 Version 22H2 for x64-based Systems 5063709 (SecurityUpdate) Important Information Disclosure Yes
Windows 11 Version 22H2 for ARM64-based Systems 5063875 (Security Update) Important Information Disclosure Yes
Windows 11 Version 22H2 for x64-based Systems 5063875 (Security Update) Important Information Disclosure Yes
Windows 11 Version 23H2 for ARM64-based Systems 5063875 (Security Update) Important Information Disclosure Yes
Windows 11 Version 23H2 for x64-based Systems 5063875 (Security Update) Important Information Disclosure Yes
Windows 11 Version 24H2 for ARM64-based Systems 5063878 (Security Update) 5064010 (SecurityHotpatchUpdate) Important Information Disclosure 5062553 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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) Important Information Disclosure 5062553 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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) Important Information Disclosure 5062624 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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) Important Information Disclosure 5062624 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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) Important Information Disclosure 5062624 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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) Important Information Disclosure 5062624 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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) Important Information Disclosure 5062632 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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) Important Information Disclosure 5062632 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C 6.1.7601.27872 Yes None Windows Server 2012 5063906 (MonthlyRollup) Important Information Disclosure Yes
Windows Server 2012 (Server Core installation) 5063906 (MonthlyRollup) Important Information Disclosure Yes
Windows Server 2012 R2 5063950 (MonthlyRollup) Important Information Disclosure Yes
Windows Server 2012 R2 (Server Core installation) 5063950 (MonthlyRollup) Important Information Disclosure Yes
Windows Server 2016 5063871 (Security Update) Important Information Disclosure Yes
Windows Server 2016 (Server Core installation) 5063871 (Security Update) Important Information Disclosure Yes
Windows Server 2019 5063877 (Security Update) Important Information Disclosure Yes
Windows Server 2019 (Server Core installation) 5063877 (Security Update) Important Information Disclosure Yes
Windows Server 2022 5063880 (SecurityUpdate) 5063812 (SecurityHotpatchUpdate) Important Information Disclosure 5062572 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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) Important Information Disclosure 5062572 Base: 6.5 Temporal: 5.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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) Important Information Disclosure 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

Anonymous

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