OnlyPatch
Windows SMB

CVE-2020-17140 — Windows SMB Information Disclosure Vulnerability

Important CVSS 8.1 EPSS 0.12161 2020-12 archive

Executive Summary

None

Overview

8.1
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Information Disclosure
Released Dec 8 2020
Last Updated Dec 8 2020
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.12161 — 0.95724 percentile
NVD CVSS 8.1 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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
None
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.1

EPSS Score

0.12161
probability of exploitation in the next 30 days
0.95724 percentile - updated 2026-07-25
View on FIRST.org

Affected Products

31 affected products
Product KB Article Severity Impact Restart Required
Windows 10 for 32-bit Systems 4592464 (Security Update) Important Information Disclosure Yes
Windows 10 for x64-based Systems 4592464 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1607 for 32-bit Systems 4593226 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1607 for x64-based Systems 4593226 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1803 for 32-bit Systems 4592446 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1803 for ARM64-based Systems 4592446 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1803 for x64-based Systems 4592446 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1809 for 32-bit Systems 4592440 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1809 for ARM64-based Systems 4592440 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1809 for x64-based Systems 4592440 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1903 for 32-bit Systems 4592449 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1903 for ARM64-based Systems 4592449 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1903 for x64-based Systems 4592449 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1909 for 32-bit Systems 4592449 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1909 for ARM64-based Systems 4592449 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1909 for x64-based Systems 4592449 (Security Update) Important Information Disclosure Yes
Windows 10 Version 2004 for 32-bit Systems 4592438 (Security Update) Important Information Disclosure Yes
Windows 10 Version 2004 for ARM64-based Systems 4592438 (Security Update) Important Information Disclosure Yes
Windows 10 Version 2004 for x64-based Systems 4592438 (Security Update) Important Information Disclosure Yes
Windows 10 Version 20H2 for 32-bit Systems 4592438 (Security Update) Important Information Disclosure Yes
Windows 10 Version 20H2 for ARM64-based Systems 4592438 (Security Update) Important Information Disclosure Yes
Windows 10 Version 20H2 for x64-based Systems 4592438 (Security Update) Important Information Disclosure Yes
Windows 7 for 32-bit Systems Service Pack 1 4592471 (Monthly Rollup) 4592503 (Security Only) Important Information Disclosure 4586827 Base: 8.1 Temporal: 7.1 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C Yes 4592471 4592503 Windows 7 for x64-based Systems Service Pack 1 4592471 (Monthly Rollup) 4592503 (Security Only) Important Information Disclosure 4586827 Base: 8.1 Temporal: 7.1 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C Yes 4592471 4592503 Windows 8.1 for 32-bit systems 4592484 (Monthly Rollup) 4592495 (Security Only) Important Information Disclosure 4586845 Base: 8.1 Temporal: 7.1 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C Yes 4592484 4592495 4592484 Windows 8.1 for x64-based systems 4592484 (Monthly Rollup) 4592495 (Security Only) Important Information Disclosure 4586845 Base: 8.1 Temporal: 7.1 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C Yes 4592484 4592495 4592484 Windows RT 8.1 4592484 (Monthly Rollup) Important Information Disclosure Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 4592471 (Monthly Rollup) 4592503 (Security Only) Important Information Disclosure 4586827 Base: 8.1 Temporal: 7.1 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C Yes 4592471 4592503 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4592471 (Monthly Rollup) 4592503 (Security Only) Important Information Disclosure 4586827 Base: 8.1 Temporal: 7.1 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C Yes 4592471 4592503 Windows Server 2012 4592468 (Monthly Rollup) 4592497 (Security Only) Important Information Disclosure 4586834 Base: 8.1 Temporal: 7.1 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C Yes 4592468 4592497 Windows Server 2012 (Server Core installation) 4592468 (Monthly Rollup) 4592497 (Security Only) Important Information Disclosure 4586834 Base: 8.1 Temporal: 7.1 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C Yes 4592468 4592497 Windows Server 2012 R2 4592484 (Monthly Rollup) 4592495 (Security Only) Important Information Disclosure 4586845 Base: 8.1 Temporal: 7.1 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C Yes 4592484 4592495 4592484 Windows Server 2012 R2 (Server Core installation) 4592484 (Monthly Rollup) 4592495 (Security Only) Important Information Disclosure 4586845 Base: 8.1 Temporal: 7.1 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C Yes 4592484 4592495 4592484 Windows Server 2016 4593226 (Security Update) Important Information Disclosure Yes
Windows Server 2016 (Server Core installation) 4593226 (Security Update) Important Information Disclosure Yes
Windows Server 2019 4592440 (Security Update) Important Information Disclosure Yes
Windows Server 2019 (Server Core installation) 4592440 (Security Update) Important Information Disclosure Yes
Windows Server, version 1903 (Server Core installation) 4592449 (Security Update) Important Information Disclosure Yes
Windows Server, version 1909 (Server Core installation) 4592449 (Security Update) Important Information Disclosure Yes
Windows Server, version 2004 (Server Core installation) 4592438 (Security Update) Important Information Disclosure Yes
Windows Server, version 20H2 (Server Core Installation) 4592438 (Security Update) Important Information Disclosure Yes

Patches

7 patches
Article Type Restart
4592464 Security Update Yes
4593226 Security Update Yes
4592446 Security Update Yes
4592440 Security Update Yes
4592449 Security Update Yes
4592438 Security Update Yes
4592484 Monthly Rollup Yes

Known Exploits

Acknowledgments

k0shl

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