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Full vulnerability report · 2020
CVE-2020-1378High confidence

Windows Registry Elevation of Privilege Vulnerability

Microsoft · Windows 10 Version 1803

7.5HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2020-12254

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

An elevation of privilege vulnerability exists when the Windows Kernel API improperly handles registry objects in memory. An attacker who successfully exploited the vulnerability could gain elevated privileges on a targeted system. A locally authenticated attacker could exploit this vulnerability by running a specially crafted application. The security update addresses the vulnerability by helping to ensure that the Windows Kernel API properly handles objects in memory.

What

An elevation of privilege vulnerability exists when the Windows Kernel API improperly handles registry objects in memory. An attacker who successfully exploited the vulnerability could gain elevated privileges on a targeted system. A locally authenticated attacker could exploit this vulnerability by running a specially crafted application. The security update addresses the vulnerability by helping to ensure that the Windows Kernel API properly handles objects in memory.

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may gain additional privileges.

What

An elevation of privilege vulnerability exists when the Windows Kernel API improperly handles registry objects in memory. An attacker who successfully exploited the vulnerability could gain elevated privileges on a targeted system. A locally authenticated attacker could exploit this vulnerability by running a specially crafted application. The security update addresses the vulnerability by helping to ensure that the Windows Kernel API properly handles objects in memory.

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may gain additional privileges.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Out-of-bounds Write → gain additional privileges
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-787

CWE-787: Out-of-bounds Write. The product writes data past the end, or before the beginning, of the intended buffer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedPrivilege escalationCWE-787
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

Cyber Security Agency of Singapore · English · CSA-SB-20200819Security Bulletin 19 Aug 2020

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 19 Aug 2020, published on 19 August 2020. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2020-AVI-501Multiples vulnérabilités dans Microsoft Windows

t de provoquer un déni de service, une atteinte à la confidentialité des données, une élévation de privilèges, une exécution de code à distance et une usurpation d'identité. Solution Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité Microsoft du 11 août 2020 https://portal.msrc.microsoft.com/fr-FR/security-guidance Référence CVE CVE-2020-1337 https://www.cve.org/CVERecord?id=CVE-2020-1337 Référence CVE CVE-2020-1339 https://www.cve.org/CVERecord?id=CVE-2020-1339 Référence CVE CVE-2020-1377 https://www.cve.org/CVERecord?id=CVE-2020-1377 Référence CVE CVE-2020-1378 https://www.cve.org/CVERecord?id=CVE-2020-1378 Référence CVE CVE-2020-1379 https://www.cve.org/CVERecord?id=CVE-2020-1379 Référence CVE CVE-2020-1383 https://www.cve.org/CVERecord?id=CVE-2020-1383 Référence CVE CVE-2020-1417 https://www.cve.org/CVERecord?id=CVE-2020-1417 Référence CVE CVE-2020-1459 https://www.cve.org/CVERecord?id=CVE-2020-1459 Référence CVE CVE-2020-1464 https://www.cve.org/CVERecord?id=CVE-2020-1464 Référence CVE CVE-2020-1466 https://www.cve.org/CVERecord?id=CVE-2020-1466 Référence CVE CVE-2020-1467 https://www.cve.org/CVERecord?id=CVE-2020-1467 Référence CVE CVE-2020-1470 https://www.cve.org/CVERecord?id=CVE-2020-1470 Ré

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-008523複数の Microsoft Windows 製品における権限を昇格される脆弱性

複数の Microsoft Windows 製品には、Windows カーネル API がメモリ内のレジストリオブジェクトを適切に処理しない場合、権限を昇格される脆弱性が存在します。 ベンダは、本脆弱性を「Windows レジストリの特権の昇格の脆弱性」として公開しています。 本脆弱性は、CVE-2020-1377 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-008522複数の Microsoft Windows 製品における権限を昇格される脆弱性

複数の Microsoft Windows 製品には、Windows カーネル API がメモリ内のレジストリオブジェクトを適切に処理しない場合、権限を昇格される脆弱性が存在します。 ベンダは、本脆弱性を「Windows レジストリの特権の昇格の脆弱性」として公開しています。 本脆弱性は、CVE-2020-1378 とは異なる脆弱性です。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5191MS 8월 보안 위협에 따른 정기 보안 업데이트 권고

- 권한상승 취약점(CVE-2020-1337, CVE-2020-1377, CVE-2020-1378, CVE-2020-1417, CVE-2020-1467, CVE-2020-1470, CVE-2020-1475, CVE-2020-1479, CVE-2020-1480, CVE-2020-1484, CVE-2020-1486, CVE-2020-1488, CVE-2020-1489, CVE-2020-1490, CVE-2020-1509, CVE-2020-1511, CVE-2020-1513, CVE-2020-1515, CVE-2020-1516, CVE-2020-1517, CVE-2020-1518, CVE-2020-1519, CVE-2020-1521, CVE-2020-1522, CVE-2020-1524, CVE-2020-1526, CVE-2020-1527, CVE-2020-1528, CVE-2020-1529, CVE-2020-1530, CVE-2020-1531, CVE-2020-1533, CVE-2020-1534, CVE-2020-1535, CVE-2020-1536, CVE-2020-1537, CVE-2020-1538, CVE-2020-1539, CVE-2020-1540, CVE-2020-1541, CVE-2020-1542, CVE-2020-1543, CVE-2020-1544, CVE-2020-1545, CVE-2020-1546, CVE-2020-1547, CVE-2020-1549, CVE-2020-1550, CVE-2020-1551, CVE-2020-1552, CVE-2020-1553, CVE-2020-1556, CVE-2020-1565, CVE-2020-1566, CVE-2020-1571, CVE-2020-1579, CVE-2020-1584, CVE-2020-1587)

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 17 Aug 2020 · Last source change 4 Aug 2024, 06:32 UTC · CWE-787 · Out-of-bounds Write

CVE recordCVE.org · 5.1
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2020-12254
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2020-1378 · cve.blacktree.nl