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Full vulnerability report · 2026
CVE-2026-45647High confidence

Microsoft Defender for Endpoint for Mac Elevation of Privilege Vulnerability

Microsoft · Microsoft Defender for Endpoint for Mac

5.5MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

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-2026-35571

No EUVD known-exploited evidence

Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.

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
5.5 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.

What

Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.

Why

The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may gain additional privileges.

What

Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.

Why

The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

How

An attacker operating through local access may attempt exploitation with low privileges. 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
local access → Time-of-check Time-of-use (TOCTOU) Race Condition → gain additional privileges
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
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-367

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

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

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

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.IHighIntegrity impact: A successful attack can cause a major loss.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
Privilege escalationCWE-367
A

Official authority intelligence

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

ENISA EUVD · EUVD-2026-35571Official EUVD mapping

Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.

Official EUVD record ↗
BSI · German · WID-SEC-2026-1848Microsoft Defender für Endpoint: Schwachstelle ermöglicht Privilegieneskalation

Ein lokaler Angreifer kann eine Schwachstelle in Microsoft Defender für Endpoint für Mac ausnutzen, um seine Privilegien zu erhöhen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260610Security Bulletin 10 Jun 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 10 Jun 2026, published on 10 June 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0731Multiples vulnérabilités dans les produits Microsoft

ulletin de sécurité Microsoft CVE-2026-45484 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45485 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45500 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45501 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45502 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45503 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45504 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45583 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45591 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45644 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45647 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45650 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47281 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47284 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47287 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47292 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47298 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47631 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47634 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47636 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47637 du 09 juin 2026 Bulletin de s

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-020665マイクロソフトのMicrosoft Defender for EndpointにおけるTime-of-check Time-of-use (TOCTOU) 競合状態の脆弱性

Microsoft Defender for Endpointにおけるチェック時刻と使用時刻の競合状態(TOCTOU)が原因で、権限を持つ攻撃者がローカルで権限を昇格させることが可能です。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6837MS 6월 보안 위협에 따른 정기 보안 업데이트 권고

Port Driver Elevation of Privilege Vulnerability | | 역할: Windows Hyper-V | CVE-2026-45641 | Windows Hyper-V Remote Code Execution Vulnerability | | Microsoft Azure 증명 서비스 및 디바이스 상태 증명 서비스 | CVE-2026-45642 | Microsoft Azure Attestation service and Device Health Attestation Service Spoofing Vulnerability | | Microsoft Office Word | CVE-2026-45643 | Microsoft Word Remote Code Execution Vulnerability | | Microsoft Live Share Canvas SDK | CVE-2026-45644 | Microsoft Live Share Canvas SDK Elevation of Privilege Vulnerability | | Microsoft Office | CVE-2026-45645 | Microsoft Office Remote Code Execution Vulnerability | | 엔드포인트용 Microsoft Defender | CVE-2026-45647 | Microsoft Defender for Endpoint for Mac Elevation of Privilege Vulnerability | | Active Directory Domain Services | CVE-2026-45648 | Windows Active Directory Domain Services Remote Code Execution Vulnerability | | Android용 Office | CVE-2026-45649 | Office for Android Spoofing Vulnerability | | Microsoft Bing | CVE-2026-45650 | Microsoft Bing Search Spoofing Vulnerability | | Windows 커널 | CVE-2026-45653 | Windows Kernel Elevation of Privilege Vulnerability | | Windows 보안 부팅 | CVE-2026-45654 | Secure Boot Security Feature Bypass Vulnerability | | Windows BitLocker | CVE-2026-45655 | Windows BitLocker Security Feature Bypass Vulnerability | |

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
Microsoft Defender for Endpoint for Mac: 101.0.0 < 101.26042.0011
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. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 9 Jun 2026 · Last source change 25 Aug 2026, 22:44 UTC · CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition

CVE recordCVE.org · 5.2
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-2026-35571
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceOther authority
NVD statusNVD enriched

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-2026-45647 · cve.blacktree.nl