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Windows Peer Name Resolution Protocol

CVE-2023-35338 — Windows Peer Name Resolution Protocol Denial of Service Vulnerability

Important CVSS 7.5 EPSS 0.01725 2023-07 archive

Executive Summary

None

Overview

7.5
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Denial of Service
Released Jul 11 2023
Last Updated Jul 11 2023
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.01725 — 0.74569 percentile
NVD CVSS 7.5 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
None
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.5

EPSS Score

0.01725
probability of exploitation in the next 30 days
0.74569 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

23 affected products
Product KB Article Severity Impact Restart Required
Windows 10 for 32-bit Systems 5028186 (Security Update) Important Denial of Service Yes
Windows 10 for x64-based Systems 5028186 (Security Update) Important Denial of Service Yes
Windows 10 Version 1607 for 32-bit Systems 5028169 (Security Update) Important Denial of Service Yes
Windows 10 Version 1607 for x64-based Systems 5028169 (Security Update) Important Denial of Service Yes
Windows 10 Version 1809 for 32-bit Systems 5028168 (Security Update) Important Denial of Service Yes
Windows 10 Version 1809 for ARM64-based Systems 5028168 (Security Update) Important Denial of Service Yes
Windows 10 Version 1809 for x64-based Systems 5028168 (Security Update) Important Denial of Service Yes
Windows 10 Version 21H2 for 32-bit Systems 5028166 (Security Update) Important Denial of Service Yes
Windows 10 Version 21H2 for ARM64-based Systems 5028166 (Security Update) Important Denial of Service Yes
Windows 10 Version 21H2 for x64-based Systems 5028166 (Security Update) Important Denial of Service Yes
Windows 10 Version 22H2 for 32-bit Systems 5028166 (Security Update) Important Denial of Service Yes
Windows 10 Version 22H2 for ARM64-based Systems 5028166 (Security Update) Important Denial of Service Yes
Windows 10 Version 22H2 for x64-based Systems 5028166 (Security Update) Important Denial of Service Yes
Windows 11 version 21H2 for ARM64-based Systems 5028182 (Security Update) Important Denial of Service Yes
Windows 11 version 21H2 for x64-based Systems 5028182 (Security Update) Important Denial of Service Yes
Windows 11 Version 22H2 for ARM64-based Systems 5028185 (Security Update) Important Denial of Service Yes
Windows 11 Version 22H2 for x64-based Systems 5028185 (Security Update) Important Denial of Service Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 5028222 (Monthly Rollup) 5028226 (Security Only) Important Denial of Service 5027279 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.0.6003.22175 Yes 5028222 5028226 Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5028222 (Monthly Rollup) 5028226 (Security Only) Important Denial of Service 5027279 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.0.6003.22175 Yes 5028222 5028226 Windows Server 2008 for x64-based Systems Service Pack 2 5028222 (Monthly Rollup) 5028226 (Security Only) Important Denial of Service 5027279 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.0.6003.22175 Yes 5028222 5028226 Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5028222 (Monthly Rollup) 5028226 (Security Only) Important Denial of Service 5027279 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.0.6003.22175 Yes 5028222 5028226 Windows Server 2008 R2 for x64-based Systems Service Pack 1 5028240 (Monthly Rollup) 5028224 (Security Only) Important Denial of Service 5027275 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.1.7601.26623 Yes 5028240 5028224 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5028240 (Monthly Rollup) 5028224 (Security Only) Important Denial of Service 5027275 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.1.7601.26623 Yes 5028240 5028224 Windows Server 2012 5028232 (Monthly Rollup) 5028233 (Security Only) Important Denial of Service 5027283 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.2.9200.24374 Yes None Windows Server 2012 (Server Core installation) 5028232 (Monthly Rollup) 5028233 (Security Only) Important Denial of Service 5027283 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.2.9200.24374 Yes None Windows Server 2012 R2 5028228 (Monthly Rollup) 5028223 (Security Only) Important Denial of Service 5027271 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.3.9600.21063 6.3.9600.21075 Yes None Windows Server 2012 R2 (Server Core installation) 5028228 (Monthly Rollup) 5028223 (Security Only) Important Denial of Service 5027271 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.3.9600.21063 6.3.9600.21075 Yes None Windows Server 2016 5028169 (Security Update) Important Denial of Service Yes
Windows Server 2016 (Server Core installation) 5028169 (Security Update) Important Denial of Service Yes
Windows Server 2019 5028168 (Security Update) Important Denial of Service Yes
Windows Server 2019 (Server Core installation) 5028168 (Security Update) Important Denial of Service Yes
Windows Server 2022 5028171 (Security Update) Important Denial of Service Yes
Windows Server 2022 (Server Core installation) 5028171 (Security Update) Important Denial of Service Yes

Patches

7 patches
Article Type Restart
5028186 Security Update Yes
5028169 Security Update Yes
5028168 Security Update Yes
5028166 Security Update Yes
5028182 Security Update Yes
5028185 Security Update Yes
5028171 Security Update Yes

Known Exploits

On This Page