BlackTreeCVE Intelligence
← Back to the CVE catalogue
Full vulnerability report · 2026
CVE-2026-56178High 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-2026-44253

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-2026-44253Official 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-2026-2322Microsoft Malware Protection Engine und Defender: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Microsoft Malware Protection Engine und Microsoft Defender ausnutzen, um beliebigen Programmcode auszuführen, erweiterte Berechtigungen zu erlangen oder vertrauliche Informationen offenzulegen.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0872Multiples vulnérabilités dans les produits Microsoft

CVE-2026-55128 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-55130 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-55132 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-55134 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-55135 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-55142 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-55145 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-55944 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-56157 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-56164 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-56178 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-56192 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-56642 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-57101 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-57102 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-58277 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-58595 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-58636 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-58644 du 14 juillet 2026 Bulletin de sécurité Microsoft CVE-2026-58647 du 14 juillet 2026 Une gestion de version détaillée se trouve à

Official advisory ↗
CSIRT Italia · Italian · aggiornamenti-mensili-microsoft-22Aggiornamenti Mensili Microsoft

nuova finestra - - CVE-2026-56195 : apre una nuova finestra - - CVE-2026-56194 : apre una nuova finestra - - CVE-2026-56193 : apre una nuova finestra - - CVE-2026-56192 : apre una nuova finestra - - CVE-2026-56190 : apre una nuova finestra - - CVE-2026-56189 : apre una nuova finestra - - CVE-2026-56188 : apre una nuova finestra - - CVE-2026-56187 : apre una nuova finestra - - CVE-2026-56186 : apre una nuova finestra - - CVE-2026-56185 : apre una nuova finestra - - CVE-2026-56184 : apre una nuova finestra - - CVE-2026-56183 : apre una nuova finestra - - CVE-2026-56182 : apre una nuova finestra - - CVE-2026-56181 : apre una nuova finestra - - CVE-2026-56178 : apre una nuova finestra - - CVE-2026-56176 : apre una nuova finestra - - CVE-2026-56175 : apre una nuova finestra - - CVE-2026-56173 : apre una nuova finestra - - CVE-2026-56170 : apre una nuova finestra - - CVE-2026-56169 : apre una nuova finestra - - CVE-2026-56168 : apre una nuova finestra - - CVE-2026-56164 : apre una nuova finestra - Presente CVE-2026-56159 : apre una nuova finestra - - CVE-2026-56157 : apre una nuova finestra - - CVE-2026-56156 : apre una nuova finestra - - CVE-2026-56155 : apre una nuova finestra - Presente CVE-2026-55949 : apre una nuova finestra - - CVE-2026-55948 : apre una nuova finestra - - CVE-2026-55947 : apr

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-024858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(TOCTOU)の競合状態により、認可された攻撃者がローカルで権限を昇格させることが可能となります。

Official advisory ↗
NCSC-NL · Dutch · NCSC-2026-0236Kwetsbaarheden verholpen in Microsoft Defender

A time-of-check time-of-use (TOCTOU) race condition vulnerability in Microsoft Defender for Endpoint allows an authorized local attacker to elevate privileges.

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 < 101.26042.0020
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 14 Jul 2026 · Last source change 9 Sept 2026, 19:40 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-2026-44253
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-2026-56178 · cve.blacktree.nl