How severe is CVE-2020-17087?

CVE-2020-17087 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-17087 being actively exploited?

Yes. CVE-2020-17087 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2020-17087?

CVE-2020-17087 primarily affects Microsoft Windows 10 1507. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-17087?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2020-17087 have an EU (EUVD) identifier?

Yes. CVE-2020-17087 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-9042. It is also flagged as exploited in the EUVD (since 2021-11-03).

When was CVE-2020-17087 published?

CVE-2020-17087 was published on 2020-11-11 and last updated on 2026-06-17.

CVE-2020-17087

CVE-2020-17087 is a high-severity vulnerability in Microsoft Windows 10 1507 with a CVSS 3.x base score of 7.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2021-11-03). The underlying weakness is classified as CWE-131.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 5% (92nd percentile)
Actively exploited: Yes — listed in CISA KEV (added 2021-11-03)
EU (EUVD) id: EUVD-2020-9042
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2021-11-03)
Weakness: CWE-131
Affected product: Microsoft Windows 10 1507
Published: 2020-11-11
Last modified: 2026-06-17

Description

Windows Kernel Local Elevation of Privilege Vulnerability

Frequently asked questions

What is CVE-2020-17087?: Windows Kernel Local Elevation of Privilege Vulnerability
How severe is CVE-2020-17087?: CVE-2020-17087 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-17087 being actively exploited?: Yes. CVE-2020-17087 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2020-17087?: CVE-2020-17087 primarily affects Microsoft Windows 10 1507. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-17087?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2020-17087 have an EU (EUVD) identifier?: Yes. CVE-2020-17087 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-9042. It is also flagged as exploited in the EUVD (since 2021-11-03).
When was CVE-2020-17087 published?: CVE-2020-17087 was published on 2020-11-11 and last updated on 2026-06-17.

References

Affected products (34)

cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_2004:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_2004:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_2004:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_20h2:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_20h2:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp2:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:1903:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*

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