OnlyFm252
Windows Media

CVE-2020-0945 — Media Foundation Information Disclosure Vulnerability

Important CVSS 5.5 EPSS 0.06488 2020-04 archive

Executive Summary

An information disclosure vulnerability exists when Media Foundation improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the user’s system. To exploit this vulnerability, an attacker would have to log onto an affected system and open a specially crafted file. In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file that is designed to exploit the vulnerability. However, an attacker would have no way to force the user to visit the website. Instead, an attacker would have to convince the user to click a link, typically by way of an enticement in an email or Instant Messenger message, and then convince the user to open the specially crafted file. The update addresses the vulnerability by correcting how Media Foundation handles objects in memory.

Overview

5.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Information Disclosure
Released Apr 14 2020
Last Updated Apr 14 2020
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.06488 — 0.92882 percentile
NVD CVSS 5.5 MEDIUM — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
None
AVAILABILITY
None
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 5.0

EPSS Score

0.06488
probability of exploitation in the next 30 days
0.92882 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

27 affected products
Product KB Article Severity Impact Restart Required
Windows 10 for 32-bit Systems 4550930 (Security Update) Important Information Disclosure Yes
Windows 10 for x64-based Systems 4550930 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1607 for 32-bit Systems 4550929 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1607 for x64-based Systems 4550929 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1709 for 32-bit Systems 4550927 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1709 for ARM64-based Systems 4550927 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1709 for x64-based Systems 4550927 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1803 for 32-bit Systems 4550922 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1803 for ARM64-based Systems 4550922 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1803 for x64-based Systems 4550922 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1809 for 32-bit Systems 4549949 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1809 for ARM64-based Systems 4549949 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1809 for x64-based Systems 4549949 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1903 for 32-bit Systems 4549951 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1903 for ARM64-based Systems 4549951 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1903 for x64-based Systems 4549951 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1909 for 32-bit Systems 4549951 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1909 for ARM64-based Systems 4549951 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1909 for x64-based Systems 4549951 (Security Update) Important Information Disclosure Yes
Windows 8.1 for 32-bit systems 4550961 (Monthly Rollup) 4550970 (Security Only) Important Information Disclosure 4541509 Base: 5.5 Temporal: 5.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C Yes 4550961 4550970 Windows 8.1 for x64-based systems 4550961 (Monthly Rollup) 4550970 (Security Only) Important Information Disclosure 4541509 Base: 5.5 Temporal: 5.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C Yes 4550961 4550970 Windows RT 8.1 4550961 (Monthly Rollup) Important Information Disclosure Yes
Windows Server 2012 R2 4550961 (Monthly Rollup) 4550970 (Security Only) Important Information Disclosure 4541509 Base: 5.5 Temporal: 5.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C Yes 4550961 4550970 Windows Server 2012 R2 (Server Core installation) 4550961 (Monthly Rollup) 4550970 (Security Only) Important Information Disclosure 4541509 Base: 5.5 Temporal: 5.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C Yes 4550961 4550970 Windows Server 2016 4550929 (Security Update) Important Information Disclosure Yes
Windows Server 2016 (Server Core installation) 4550929 (Security Update) Important Information Disclosure Yes
Windows Server 2019 4549949 (Security Update) Important Information Disclosure Yes
Windows Server 2019 (Server Core installation) 4549949 (Security Update) Important Information Disclosure Yes
Windows Server, version 1803 (Server Core Installation) 4550922 (Security Update) Important Information Disclosure Yes
Windows Server, version 1903 (Server Core installation) 4549951 (Security Update) Important Information Disclosure Yes
Windows Server, version 1909 (Server Core installation) 4549951 (Security Update) Important Information Disclosure Yes

Patches

7 patches
Article Type Restart
4550930 Security Update Yes
4550929 Security Update Yes
4550927 Security Update Yes
4550922 Security Update Yes
4549949 Security Update Yes
4549951 Security Update Yes
4550961 Monthly Rollup Yes

Known Exploits

Acknowledgments

Ke Liu

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