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CVE-2026-45657

54
FAUCET Score

Use after free in Windows Kernel allows an unauthorized attacker to execute code over a network.

First published: Jun 9, 2026Last modified: Jun 9, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 10.0.22631.7219CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
< 10.0.22631.7219CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
< 10.0.26100.8655CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
< 10.0.26100.8655CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
< 10.0.26200.8655CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
15.48%
Probability of exploitation in next 30 days
EPSS Percentile
96.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1548 is in the 92nd percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (13)

microsoftpatch availablevia msrc
Product: Windows Server 2022Fixed in: 10.0.20348.5256
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2022 (Server Core installation)Fixed in: 10.0.20348.5256
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2025 (Server Core installation)Fixed in: 10.0.26100.32995
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2025Fixed in: 10.0.26100.32995
View patch
microsoftpatch availablevia msrc
Product: Windows 11 Version 25H2 for ARM64-based SystemsFixed in: 10.0.26200.8655
View patch
microsoftpatch availablevia msrc
Product: Windows 11 Version 25H2 for x64-based SystemsFixed in: 10.0.26200.8655
View patch
microsoftpatch availablevia msrc
Product: Windows 11 Version 23H2 for ARM64-based SystemsFixed in: 10.0.22631.7219
View patch
microsoftpatch availablevia msrc
Product: Windows 11 Version 23H2 for x64-based SystemsFixed in: 10.0.22631.7219
View patch
microsoftpatch availablevia msrc
Product: Windows 11 Version 24H2 for ARM64-based SystemsFixed in: 10.0.26100.8655
View patch
microsoftpatch availablevia msrc
Product: Windows 11 Version 24H2 for x64-based SystemsFixed in: 10.0.26100.8655
View patch
microsoftpatch availablevia msrc
Product: Windows 11 version 26H1 for x64-based SystemsFixed in: 10.0.28000.2269
View patch
microsoftpatch availablevia msrc
Product: Windows 11 Version 26H1 for ARM64-based SystemsFixed in: 10.0.28000.2269
View patch
microsoftvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

microsoft2026-Jun/CVE-2026-45657Critical

Windows Kernel Remote Code Execution Vulnerability

Jun 9, 2026

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2026-45657
Vendor Advisory