Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2020-0601

CVE-2020-0601HIGH

Microsoft Windows

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   R  U  H  H  N    8.1   .8944   99.8   YES

AFFECTED
  Product                                                  Versions                              Fixed
  Windows                                                  10 Version 1803 for 32-bit Systems –  —
  Windows Server                                           version 1803  (Core Installation) –   —
  Windows 10 Version 1903 for 32-bit Systems               unspecified –                         —
  Windows 10 Version 1903 for x64-based Systems            unspecified –                         —
  Windows 10 Version 1903 for ARM64-based Systems          unspecified –                         —
  Windows Server, version 1903 (Server Core installation)  unspecified –                         —
  Windows 10 Version 1909 for 32-bit Systems               unspecified –                         —
  Windows 10 Version 1909 for x64-based Systems            unspecified –                         —
  Windows Server, version 1909 (Server Core installation)  unspecified –                         —
  Windows 10 Version 1909 for ARM64-based Systems          unspecified –                         —

TIMELINE
  Nov 4   Reserved by microsoft
  Jan 14  Published (CNA: microsoft)
  Nov 3   Added to CISA KEV, remediation due 2022-05-03

CWE-295 · CNA: microsoft · CVSS v3.1 · 4 references · KEV due May 3, 2022

Description

A spoofing vulnerability exists in the way Windows CryptoAPI (Crypt32.dll) validates Elliptic Curve Cryptography (ECC) certificates.An attacker could exploit the vulnerability by using a spoofed code-signing certificate to sign a malicious executable, making it appear the file was from a trusted, legitimate source, aka 'Windows CryptoAPI Spoofing Vulnerability'.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
November 4, 2019	Reserved	Reserved by microsoft
January 14, 2020	Published	Published (CNA: microsoft)
November 3, 2021	KEV ADDED	Added to CISA KEV, remediation due 2022-05-03

Affected

Affected products and packages — 10 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Microsoft	Windows	—	10 Version 1803 for 32-bit Systems	—
Microsoft	Windows Server	—	version 1803 (Core Installation)	—
Microsoft	Windows 10 Version 1903 for 32-bit Systems	—	unspecified	—
Microsoft	Windows 10 Version 1903 for x64-based Systems	—	unspecified	—
Microsoft	Windows 10 Version 1903 for ARM64-based Systems	—	unspecified	—
Microsoft	Windows Server, version 1903 (Server Core installation)	—	unspecified	—
Microsoft	Windows 10 Version 1909 for 32-bit Systems	—	unspecified	—
Microsoft	Windows 10 Version 1909 for x64-based Systems	—	unspecified	—
Microsoft	Windows Server, version 1909 (Server Core installation)	—	unspecified	—
Microsoft	Windows 10 Version 1909 for ARM64-based Systems	—	unspecified	—

Weaknesses

CWE-295

References (4)

http://packetstormsecurity.com/files/155960/CurveBall-Microsoft-Windows-CryptoAPI-Spoofing-Proof-Of-Concept.html [x_refsource_MISC]
http://packetstormsecurity.com/files/155961/CurveBall-Microsoft-Windows-CryptoAPI-Spoofing-Proof-Of-Concept.html [x_refsource_MISC]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0601 [x_refsource_MISC]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0601 [government-resource]

Authoritative record: CVE-2020-0601 at cve.org

Vendors: microsoft

Weaknesses: CWE-295

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2020-0601 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.