OnlyPatch
Windows Media

CVE-2025-29840 — Windows Media Remote Code Execution Vulnerability

Important CVSS 8.8 EPSS 0.00837 2025-05 archive

Executive Summary

Stack-based buffer overflow in Windows Media allows an unauthorized 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
Weakness CWE-121: Stack-based Buffer Overflow
Released May 13 2025
Last Updated May 13 2025
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00837 — 0.5402 percentile
NVD CVSS 8.8 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
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

0.00837
probability of exploitation in the next 30 days
0.5402 percentile - updated 2026-07-25
View on FIRST.org

Affected Products

22 affected products
Product KB Article Severity Impact Restart Required
Windows 10 for 32-bit Systems 5058387 (Security Update) Important Remote Code Execution Yes
Windows 10 for x64-based Systems 5058387 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 1607 for 32-bit Systems 5058383 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 1607 for x64-based Systems 5058383 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 1809 for 32-bit Systems 5058392 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 1809 for x64-based Systems 5058392 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 21H2 for 32-bit Systems 5058379 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 21H2 for ARM64-based Systems 5058379 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 21H2 for x64-based Systems 5058379 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 22H2 for 32-bit Systems 5058379 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 22H2 for ARM64-based Systems 5058379 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 22H2 for x64-based Systems 5058379 (Security Update) Important Remote Code Execution Yes
Windows 11 Version 22H2 for ARM64-based Systems 5058405 (Security Update) Important Remote Code Execution Yes
Windows 11 Version 22H2 for x64-based Systems 5058405 (Security Update) Important Remote Code Execution Yes
Windows 11 Version 23H2 for ARM64-based Systems 5058405 (Security Update) Important Remote Code Execution Yes
Windows 11 Version 23H2 for x64-based Systems 5058405 (Security Update) Important Remote Code Execution Yes
Windows Server 2016 5058383 (Security Update) Important Remote Code Execution Yes
Windows Server 2016 (Server Core installation) 5058383 (Security Update) Important Remote Code Execution Yes
Windows Server 2019 5058392 (Security Update) Important Remote Code Execution Yes
Windows Server 2019 (Server Core installation) 5058392 (Security Update) Important Remote Code Execution Yes
Windows Server 2022 5058385 (Security Update) 5058500 (SecurityHotpatchUpdate) Important Remote Code Execution 5055526 Base: 8.8 Temporal: 7.7 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.20348.3692 10.0.20348.3630 Yes None Windows Server 2022 (Server Core installation) 5058385 (Security Update) Important Remote Code Execution Yes
Windows Server 2022, 23H2 Edition (Server Core installation) 5058384 (Security Update) Important Remote Code Execution Yes

Patches

7 patches
Article Type Restart
5058387 Security Update Yes
5058383 Security Update Yes
5058392 Security Update Yes
5058379 Security Update Yes
5058405 Security Update Yes
5058385 Security Update Yes
5058384 Security Update Yes

Known Exploits

Acknowledgments

Dan Mattson with Microsoft

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