What it is
CVE-2020-17087 is Windows Kernel Local Elevation of Privilege Vulnerability affecting Microsoft Windows 10 Version 1803 and 31 other products.
Vulnerability report
Exploited in the wild
Confirmed confidence
In CISA KEV
CVE-2020-17087
Windows Kernel Local Elevation of Privilege Vulnerability
Microsoft / Windows 10 Version 1803 · affected before publication
- Severity
- CVSS 7.8 · High
- Confidence
- Confirmed
- Exploit status
- Exploited in the wild
- EPSS
- 5.4%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.
Who is affected?
Microsoft / Windows 10 Version 1803 affected before publication.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
Windows Kernel Local Elevation of Privilege Vulnerability
Windows Kernel Local Elevation of Privilege Vulnerability
Vendor
Product
Affected
Status
Microsoft
Windows 10 Version 1803
Before publication
Affected
Microsoft
Windows 10 Version 1809
Before publication
Affected
Microsoft
Windows Server 2019
Before publication
Affected
Microsoft
Windows Server 2019 (Server Core installation)
Before publication
Affected
Microsoft
Windows 10 Version 1909
Before publication
Affected
Microsoft
Windows Server, version 1909 (Server Core installation)
Before publication
Affected
Microsoft
Windows 10 Version 1903 for 32-bit Systems
Before publication
Affected
Microsoft
Windows 10 Version 1903 for x64-based Systems
Before publication
Affected
Microsoft
Windows 10 Version 1903 for ARM64-based Systems
Before publication
Affected
Microsoft
Windows Server, version 1903 (Server Core installation)
Before publication
Affected
Microsoft
Windows 10 Version 2004
Before publication
Affected
Microsoft
Windows Server version 2004
Before publication
Affected
Microsoft
Windows 10 Version 20H2
Before publication
Affected
Microsoft
Windows Server version 20H2
Before publication
Affected
Microsoft
Windows 10 Version 1507
Before publication
Affected
Microsoft
Windows 10 Version 1607
Before publication
Affected
Microsoft
Windows Server 2016
Before publication
Affected
Microsoft
Windows Server 2016 (Server Core installation)
Before publication
Affected
Microsoft
Windows 7
Before publication
Affected
Microsoft
Windows 7 Service Pack 1
Before publication
Affected
Microsoft
Windows 8.1
Before publication
Affected
Microsoft
Windows Server 2008 Service Pack 2
Before publication
Affected
Microsoft
Windows Server 2008 Service Pack 2 (Server Core installation)
Before publication
Affected
Microsoft
Windows Server 2008 Service Pack 2
Before publication
Affected
Microsoft
Windows Server 2008 R2 Service Pack 1
Before publication
Affected
- Published
- 11 Nov 2020
- Exploitation Reported
- 03 Nov 2021
- Attack vector
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
Tags
cisa
windows
microsoft
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2020-17087
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17087 portal.msrc.microsoft.com · CVE Record https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CV...
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
CISA
Independent exploitation attestation added to the KEV Intelligence record.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2021-11-03 00:00 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
No scanner integrations recorded yet.
Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
7.8
High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
EPSS
5.4%
Weaknesses
Timeline
From disclosure to observed exploitation
-
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2020-17087
Free JSON includes basic KEV fields{
"cve_id": "CVE-2020-17087",
"confidence": "Confirmed",
"cvss_score": 7.8,
"cvss_estimated": false,
"epss_score": 0.05431,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
Receive curator-selected alerts when exploitation activity warrants attention. Each alert includes the evidence and context needed to decide what requires attention now.