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High 8.1Known exploited (CISA KEV)Published Jan 14, 2020
CVE-2020-0601A 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…
Updated under an hour ago ()
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It affects Microsoft Windows and 22 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Nov 3, 2021; federal agencies had to remediate by May 3, 2022. Treat that date as your deadline.
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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'.
- CVSS
- 8.1 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-295
- Known exploited
- Added to CISA KEV Nov 3, 2021; federal remediation due May 3, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 89.44% (percentile 100)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Windows microsoft:windows (from the name) | 10 Version 1803 for 32-bit Systems; 10 Version 1803 for x64-based Systems; 10 Version 1803 for ARM64-based Systems; 10 Version 1809 for 32-bit Systems; 10 Version 1809 for x64-based Systems; 10 Version 1809 for ARM64-based Systems; 10 Version 1709 for 32-bit Systems; 10 Version 1709 for x64-based Systems; and 5 more ranges | CNA record |
Microsoft Windows Server microsoft:windows_server (from the name) | version 1803 (Core Installation); 2019; 2019 (Core installation); 2016; 2016 (Core installation) | CNA record |
Microsoft Windows 10 Version 1903 for 32-bit Systems microsoft:windows_10_version_1903_for_32_bit_systems (from the name) | unspecified | CNA record |
Microsoft Windows 10 Version 1903 for x64-based Systems microsoft:windows_10_version_1903_for_x64_based_systems (from the name) | unspecified | CNA record |
Microsoft Windows 10 Version 1903 for ARM64-based Systems microsoft:windows_10_version_1903_for_arm64_based_systems (from the name) | unspecified | CNA record |
Microsoft Windows Server, version 1903 (Server Core installation) microsoft:windows_server_version_1903_server_core_installation (from the name) | unspecified | CNA record |
Microsoft Windows 10 Version 1909 for 32-bit Systems microsoft:windows_10_version_1909_for_32_bit_systems (from the name) | unspecified | CNA record |
Microsoft Windows 10 Version 1909 for x64-based Systems microsoft:windows_10_version_1909_for_x64_based_systems (from the name) | unspecified | CNA record |
Microsoft Windows Server, version 1909 (Server Core installation) microsoft:windows_server_version_1909_server_core_installation (from the name) | unspecified | CNA record |
Microsoft Windows 10 Version 1909 for ARM64-based Systems microsoft:windows_10_version_1909_for_arm64_based_systems (from the name) | unspecified | CNA record |
microsoft windows_10_1507 microsoft:windows_10_1507 | all versions; all versions | NVD |
microsoft windows_10_1607 microsoft:windows_10_1607 | all versions; all versions | NVD |
microsoft windows_10_1709 microsoft:windows_10_1709 | all versions; all versions; all versions | NVD |
microsoft windows_10_1803 microsoft:windows_10_1803 | all versions; all versions; all versions | NVD |
microsoft windows_10_1809 microsoft:windows_10_1809 | all versions; all versions; all versions | NVD |
microsoft windows_10_1903 microsoft:windows_10_1903 | all versions; all versions; all versions | NVD |
microsoft windows_10_1909 microsoft:windows_10_1909 | all versions; all versions; all versions | NVD |
microsoft windows_server_1803 microsoft:windows_server_1803 | all versions | NVD |
microsoft windows_server_1903 microsoft:windows_server_1903 | all versions | NVD |
microsoft windows_server_1909 microsoft:windows_server_1909 | all versions | NVD |
microsoft windows_server_2016 microsoft:windows_server_2016 | all versions | NVD |
microsoft windows_server_2019 microsoft:windows_server_2019 | all versions | NVD |
golang go golang:go | from 1.12 before 1.12.16; from 1.13 before 1.13.7 | NVD |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0601x-refsource-misc, patch, vendor-advisory
- http://packetstormsecurity.com/files/155961/CurveBall-Microsoft-Windows-CryptoAPI-Spoofing-Proof-Of-Concept.htmlx-refsource-misc, third-party-advisory, vdb-entry
- http://packetstormsecurity.com/files/155960/CurveBall-Microsoft-Windows-CryptoAPI-Spoofing-Proof-Of-Concept.htmlx-refsource-misc, third-party-advisory, vdb-entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0601us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.