OnlyFm252
Microsoft Graphics Component

CVE-2020-1355 — Windows Font Driver Host Remote Code Execution Vulnerability

Important CVSS 7.8 EPSS 0.03951 2020-07 archive

Executive Summary

A remote code execution vulnerability exists when the Windows Font Driver Host improperly handles memory. An attacker who successfully exploited the vulnerability would gain execution on a victim system. The security update addresses the vulnerability by correcting how the Windows Font Driver Host handles memory.

Overview

7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Remote Code Execution
Released Jul 14 2020
Last Updated Jul 14 2020
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.03951 — 0.89073 percentile
NVD CVSS 7.8 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.0

EPSS Score

0.03951
probability of exploitation in the next 30 days
0.89073 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

12 affected products
Product KB Article Severity Impact Restart Required
Windows 10 Version 1903 for 32-bit Systems 4565483 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 1903 for ARM64-based Systems 4565483 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 1903 for x64-based Systems 4565483 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 1909 for 32-bit Systems 4565483 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 1909 for ARM64-based Systems 4565483 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 1909 for x64-based Systems 4565483 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 2004 for 32-bit Systems 4565503 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 2004 for ARM64-based Systems 4565503 (Security Update) Important Remote Code Execution Yes
Windows 10 Version 2004 for x64-based Systems 4565503 (Security Update) Important Remote Code Execution Yes
Windows Server, version 1903 (Server Core installation) 4565483 (Security Update) Important Remote Code Execution Yes
Windows Server, version 1909 (Server Core installation) 4565483 (Security Update) Important Remote Code Execution Yes
Windows Server, version 2004 (Server Core installation) 4565503 (Security Update) Important Remote Code Execution Yes

Patches

2 patches
Article Type Restart
4565483 Security Update Yes
4565503 Security Update Yes

Known Exploits

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