OnlyPatch
Windows Cryptographic Services

CVE-2025-29828 — Windows Schannel Remote Code Execution Vulnerability

Critical CVSS 8.1 EPSS 0.01151 2025-06 archive

Executive Summary

Missing release of memory after effective lifetime in Windows Cryptographic Services allows an unauthorized attacker to execute code over a network.

Overview

8.1
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Remote Code Execution
Weakness CWE-401: Missing Release of Memory after Effective Lifetime
Released Jun 10 2025
Last Updated Jun 10 2025
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.01151 — 0.63642 percentile
NVD CVSS 8.1 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.1

EPSS Score

0.01151
probability of exploitation in the next 30 days
0.63642 percentile - updated 2026-07-25
View on FIRST.org

Affected Products

5 affected products
Product KB Article Severity Impact Restart Required
Windows 11 Version 22H2 for ARM64-based Systems 5060999 (Security Update) Critical Remote Code Execution Yes
Windows 11 Version 22H2 for x64-based Systems 5060999 (Security Update) Critical Remote Code Execution Yes
Windows 11 Version 23H2 for ARM64-based Systems 5060999 (Security Update) Critical Remote Code Execution Yes
Windows 11 Version 23H2 for x64-based Systems 5060999 (Security Update) Critical Remote Code Execution Yes
Windows 11 Version 24H2 for ARM64-based Systems 5060842 (Security Update) 5060841 (SecurityHotpatchUpdate) Critical Remote Code Execution 5058411 5058497 Base: 8.1 Temporal: 7.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.26100.4349 10.0.26100.4270 Yes None Windows 11 Version 24H2 for x64-based Systems 5060842 (Security Update) 5060841 (SecurityHotpatchUpdate) Critical Remote Code Execution 5058411 5058497 Base: 8.1 Temporal: 7.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.26100.4349 10.0.26100.4270 Yes None Windows Server 2022 5060526 (Security Update) 5060525 (SecurityHotpatchUpdate) Critical Remote Code Execution 5058385 5058500 Base: 8.1 Temporal: 7.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.20348.3807 10.0.20348.3745 Yes None Windows Server 2022 (Server Core installation) 5060526 (Security Update) 5060525 (SecurityHotpatchUpdate) Critical Remote Code Execution 5058385 5058500 Base: 8.1 Temporal: 7.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.20348.3807 10.0.20348.3745 Yes None Windows Server 2022, 23H2 Edition (Server Core installation) 5060118 (Security Update) Critical Remote Code Execution Yes

Patches

2 patches
Article Type Restart
5060999 Security Update Yes
5060118 Security Update Yes

Known Exploits

Acknowledgments

Anonymous

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