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High 7.8Known exploited (CISA KEV)Published Aug 17, 2020
CVE-2020-1464Windows Spoofing Vulnerability
Updated under an hour ago ()
Does this affect you?
It affects Microsoft Windows 10 Version 1803 and 21 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 when Windows incorrectly validates file signatures. An attacker who successfully exploited this vulnerability could bypass security features and load improperly signed files. In an attack scenario, an attacker could bypass security features intended to prevent improperly signed files from being loaded. The update addresses the vulnerability by correcting how Windows validates file signatures.
- CVSS
- 7.8 HIGH (v3.1, CNA)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
- Weakness (CWE)
- CWE-347
- 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)
- 38.95% (percentile 99)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Windows 10 Version 1803 microsoft:windows_10_1809 | from 10.0.0 before publication | CNA record |
Microsoft Windows 10 Version 1803 microsoft:windows_10_1803 | from 10.0.0 before publication | CNA record |
Microsoft Windows Server 2019 microsoft:windows_server_2019 | from 10.0.0 before publication | CNA record |
Microsoft Windows 10 Version 1909 microsoft:windows_10_1909 | from 10.0.0 before publication | CNA record |
Microsoft Windows Server, version 1909 (Server Core installation) microsoft:windows_server_1909 | from 10.0.0 before publication | CNA record |
Microsoft Windows 10 Version 1709 for 32-bit Systems microsoft:windows_10 | from 10.0.0 before publication | CNA record |
Microsoft Windows Server, version 1903 (Server Core installation) microsoft:windows_server_1903 | from 10.0.0 before publication | CNA record |
Microsoft Windows Server version 2004 microsoft:windows_server_2004 | from 10.0.0 before publication | CNA record |
Microsoft Windows 10 Version 1507 microsoft:windows_10_1507 | from 10.0.0 before publication | CNA record |
Microsoft Windows 10 Version 1607 microsoft:windows_10_1607 | from 10.0.0 before publication | CNA record |
Microsoft Windows Server 2016 microsoft:windows_server_2016 | from 10.0.0 before publication | CNA record |
Microsoft Windows 7 microsoft:windows_7 | from 6.1.0 before publication | CNA record |
Microsoft Windows 8.1 microsoft:windows_8.1 | from 6.3.0 before publication | CNA record |
Microsoft Windows 8.1 microsoft:windows_rt_8.1 | from 6.3.0 before publication | CNA record |
Microsoft Windows Server 2008 Service Pack 2 microsoft:windows_server_2008_sp2 | from 6.0.0 before publication | CNA record |
Microsoft Windows Server 2008 R2 Service Pack 1 microsoft:windows_server_2008_r2 | from 6.1.0 before publication | CNA record |
Microsoft Windows Server 2012 microsoft:windows_server_2012 | from 6.2.0 before publication | CNA record |
Microsoft Windows Server 2012 R2 microsoft:windows_server_2012_r2 | from 6.3.0 before publication | CNA record |
microsoft windows_10_1507 microsoft:windows_10_1507 | all versions | NVD |
microsoft windows_10_1607 microsoft:windows_10_1607 | all versions | NVD |
microsoft windows_10_1709 microsoft:windows_10_1709 | all versions | NVD |
microsoft windows_10_1803 microsoft:windows_10_1803 | all versions | NVD |
microsoft windows_10_1809 microsoft:windows_10_1809 | all versions | NVD |
microsoft windows_10_1903 microsoft:windows_10_1903 | all versions | NVD |
microsoft windows_10_1909 microsoft:windows_10_1909 | all versions | NVD |
microsoft windows_10_2004 microsoft:windows_10_2004 | all versions | NVD |
microsoft windows_7 microsoft:windows_7 | all versions | NVD |
microsoft windows_8.1 microsoft:windows_8.1 | all versions | NVD |
microsoft windows_rt_8.1 microsoft:windows_rt_8.1 | 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_2004 microsoft:windows_server_2004 | all versions | NVD |
microsoft windows_server_2008 microsoft:windows_server_2008 | all versions; r2 | NVD |
microsoft windows_server_2012 microsoft:windows_server_2012 | all versions; r2 | NVD |
microsoft windows_server_2016 microsoft:windows_server_2016 | all versions | NVD |
microsoft windows_server_2019 microsoft:windows_server_2019 | all versions | NVD |
References
- https://medium.com/%40TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bdx-refsource-misc, exploit, third-party-advisory
- https://krebsonsecurity.com/2020/08/microsoft-put-off-fixing-zero-day-for-2-years/x-refsource-misc, issue-tracking, third-party-advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1464x-refsource-misc, patch, vendor-advisory
- https://blog.virustotal.com/2019/01/distribution-of-malicious-jar-appended.htmlx-refsource-misc, third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1464us-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.