CVE-2020-1384· NVD / CVE Program· CNA microsoft

An elevation of privilege vulnerability exists when the Windows Cryptography Next Generation (CNG) Key Isolation service improperly handles

An elevation of privilege vulnerability exists when the Windows Cryptography Next Generation (CNG) Key Isolation service improperly handles memory, aka 'Windows CNG Key Isolation Service Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-1359.

HighCVSS 7.8 · v3.1—No exploit No fix recorded

Local privilege escalation

BDU:2020-03472

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Published: Jul 14, 2020
Updated: Jun 16, 2026
EPSS: 0.8% · 54th percentile
CWE: —

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Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.8%

Affected systems

Vendor	Product	CPE
microsoft	windows 10	cpe:2.3:o:microsoft:windows_10
microsoft	windows 7	cpe:2.3:o:microsoft:windows_7
microsoft	windows 8.1	cpe:2.3:o:microsoft:windows_8.1
microsoft	windows rt 8.1	cpe:2.3:o:microsoft:windows_rt_8.1
microsoft	windows server 2008	cpe:2.3:o:microsoft:windows_server_2008
microsoft	windows server 2012	cpe:2.3:o:microsoft:windows_server_2012
microsoft	windows server 2016	cpe:2.3:o:microsoft:windows_server_2016
microsoft	windows server 2019	cpe:2.3:o:microsoft:windows_server_2019

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

microsoft windows server 2008all versions
microsoft windows server 2008r2
microsoft windows server 2012all versions
microsoft windows server 2012r2
microsoft windows server 2016all versions
microsoft windows server 20161903
microsoft windows server 20161909
microsoft windows server 20162004
microsoft windows server 2019all versions

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

Microsoft Windows
- 10 Version 1709 for 32-bit Systems, 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 x64-based Systems, 10 Version 1709 for ARM64-based Systems, 10 for 32-bit Systems, 10 for x64-based Systems, 10 Version 1607 for 32-bit Systems … (+6)affected
Microsoft Windows 10 Version 1903 for 32-bit Systems
- unspecifiedaffected
Microsoft Windows 10 Version 1903 for ARM64-based Systems
- unspecifiedaffected
Microsoft Windows 10 Version 1903 for x64-based Systems
- unspecifiedaffected
Microsoft Windows 10 Version 1909 for 32-bit Systems
- unspecifiedaffected
Microsoft Windows 10 Version 1909 for ARM64-based Systems
- unspecifiedaffected
Microsoft Windows 10 Version 1909 for x64-based Systems
- unspecifiedaffected
Microsoft Windows 10 Version 2004 for 32-bit Systems
- unspecifiedaffected
Microsoft Windows 10 Version 2004 for ARM64-based Systems
- unspecifiedaffected
Microsoft Windows 10 Version 2004 for x64-based Systems
- unspecifiedaffected
Microsoft Windows Server
- 2019, 2019 (Core installation), 2016, 2016 (Core installation), 2008 for 32-bit Systems Service Pack 2, 2008 for 32-bit Systems Service Pack 2 (Core installation), 2008 for x64-based Systems Service Pack 2, 2008 for x64-based Systems Service Pack 2 (Core installation), 2008 R2 for x64-based Systems Service Pack 1, 2008 R2 for x64-based Systems Service Pack 1 (Core installation), 2012, 2012 (Core installation) … (+2)affected
Microsoft Windows Server, version 1903 (Server Core installation)
- unspecifiedaffected

Same product

microsoft: all records

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Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Someone with local access to the system can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1384

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records

Noroxi analysis

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Data sources and verification

CNA: microsoft

CVE.org (CNA)Aug 4, 2024, 6:32 AM UTC
NVDJun 16, 2026, 11:01 PM UTC
FIRST EPSSSep 29, 2026, 12:00 AM UTC

Each line is when that source was last processed for this record.

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