Is CVE-2020-17087 being actively exploited?

Yes. CVE-2020-17087 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on November 3, 2021.

What is the CVSS score for CVE-2020-17087?

CVE-2020-17087 has a CVSS 3.1 base score of 7.8 (HIGH).

CVE-2020-17087

HIGH · CVSS 7.8CISA KEV: actively exploitedEPSS 5.4%EU EUVD: exploited

Windows Kernel Local Elevation of Privilege Vulnerability

Key facts

CVSS score: 7.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-131
EPSS score: 5.4% (93th percentile)
In CISA KEV: Yes, added November 3, 2021
In EU EUVD: Yes (EUVD-2020-9042)
Published: November 11, 2020
NVD last modified: June 17, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Microsoft Windows Kernel Privilege Escalation Vulnerability

Added to the KEV catalog on November 3, 2021; federal remediation due May 3, 2022.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2020-9042 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 21, 2025.

View on the EU Vulnerability Database

Affected products

microsoft / windows 10 1507
microsoft / windows 10 1507
microsoft / windows 10 1607
microsoft / windows 10 1607
microsoft / windows 10 1803
microsoft / windows 10 1803
microsoft / windows 10 1803
microsoft / windows 10 1809
microsoft / windows 10 1809
microsoft / windows 10 1809
microsoft / windows 10 1903
microsoft / windows 10 1903
microsoft / windows 10 1903
microsoft / windows 10 1909
microsoft / windows 10 1909
microsoft / windows 10 1909
microsoft / windows 10 2004
microsoft / windows 10 2004
microsoft / windows 10 2004
microsoft / windows 10 20h2
microsoft / windows 10 20h2
microsoft / windows 7
microsoft / windows 8.1
microsoft / windows rt 8.1
microsoft / windows server 2008
microsoft / windows server 2008
microsoft / windows server 2012
microsoft / windows server 2012
microsoft / windows server 2016
microsoft / windows server 2016
microsoft / windows server 2016
microsoft / windows server 2016
microsoft / windows server 2016
microsoft / windows server 2019

Certified products that may be affected

2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Windows 7 BitLocker™ Drive Encryption - Microsoft Corporation - FIPS 140 1332 - historical
Microsoft Windows 7 Kernel Mode Cryptographic Primitives Library (cng.sys) - Microsoft Corporation - FIPS 140 1328 - historical

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17087(Patch, Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-17087(US Government Resource)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain