OnlyFm252
RPC Runtime

CVE-2026-23669 — RPC Runtime Library Remote Code Execution Vulnerability

Important CVSS 8.8 EPSS 0.00912 2026-03 archive

Executive Summary

Use after free in RPC Runtime allows an authorized attacker to execute code over a network.

Overview

8.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Remote Code Execution
Released Mar 10 2026
Last Updated Mar 10 2026
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00912 — 0.5534 percentile
NVD CVSS 8.8 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.7

EPSS Score

0.00912
probability of exploitation in the next 30 days
0.5534 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

23 affected products
Product KB Article Severity Impact Restart Required
Windows 10 Version 1607 for 32-bit Systems 5078938 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 1607 for x64-based Systems 5078938 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 1809 for 32-bit Systems 5078752 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 1809 for x64-based Systems 5078752 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 21H2 for 32-bit Systems 5078885 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 21H2 for ARM64-based Systems 5078885 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 21H2 for x64-based Systems 5078885 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 22H2 for 32-bit Systems 5078885 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 22H2 for ARM64-based Systems 5078885 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 22H2 for x64-based Systems 5078885 (Security Update) Important Remote Code Execution Yes
Windows 11 Version 23H2 for ARM64-based Systems 5078883 (Security Update) Important Remote Code Execution Yes
Windows 11 Version 23H2 for x64-based Systems 5078883 (Security Update) Important Remote Code Execution Yes
Windows 11 Version 24H2 for ARM64-based Systems 5079473 (Security Update) 5079420 (Security Hotpatch Update) Important Remote Code Execution 5077181 5077212 Base: 8.8 Temporal: 7.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.26100.8037 10.0.26100.7979 Yes None Windows 11 Version 24H2 for x64-based Systems 5079473 (Security Update) 5079420 (Security Hotpatch Update) Important Remote Code Execution 5077181 5077212 Base: 8.8 Temporal: 7.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.26100.8037 10.0.26100.7979 Yes None Windows 11 Version 25H2 for ARM systems 5079473 (Security Update) 5079420 (Security Hotpatch Update) Important Remote Code Execution 5077181 5077212 Base: 8.8 Temporal: 7.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.26200.8037 10.0.26200.7979 Yes None Windows 11 Version 25H2 for x64-based Systems 5079473 (Security Update) 5079420 (Security Hotpatch Update) Important Remote Code Execution 5077181 5077212 Base: 8.8 Temporal: 7.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.26200.8037 10.0.26200.7979 Yes None Windows 11 Version 26H1 for ARM64-based Systems 5079466 (Security Update) Important Remote Code Execution Yes
Windows 11 version 26H1 for x64-based Systems 5079466 (Security Update) Important Remote Code Execution Yes
Windows Server 2012 5078775 (Monthly Rollup) Important Remote Code Execution Yes
Windows Server 2012 (Server Core installation) 5078775 (Monthly Rollup) Important Remote Code Execution Yes
Windows Server 2012 R2 5078774 (Monthly Rollup) Important Remote Code Execution Yes
Windows Server 2012 R2 (Server Core installation) 5078774 (Monthly Rollup) Important Remote Code Execution Yes
Windows Server 2016 5078938 (Security Update) Important Remote Code Execution Yes
Windows Server 2016 (Server Core installation) 5078938 (Security Update) Important Remote Code Execution Yes
Windows Server 2019 5078752 (Security Update) Important Remote Code Execution Yes
Windows Server 2019 (Server Core installation) 5078752 (Security Update) Important Remote Code Execution Yes
Windows Server 2022 5078766 (Security Update) 5078737 (Security Hotpatch Update) Important Remote Code Execution 5075906 5075943 Base: 8.8 Temporal: 7.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.20348.4893 10.0.20348.4830 Yes No None Windows Server 2022 (Server Core installation) 5078766 (Security Update) 5078737 (Security Hotpatch Update) Important Remote Code Execution 5075906 5075943 Base: 8.8 Temporal: 7.7 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.20348.4893 10.0.20348.4830 Yes No None Windows Server 2022, 23H2 Edition (Server Core installation) 5078734 (Security Update) Important Remote Code Execution Yes

Patches

8 patches
Article Type Restart
5078938 Security Update Yes
5078752 Security Update Yes
5078885 Security Update Yes
5078883 Security Update Yes
5079466 Security Update Yes
5078775 Monthly Rollup Yes
5078774 Monthly Rollup Yes
5078734 Security Update Yes

Known Exploits

Acknowledgments

Andrea Pierini

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