CVE-2026-50658

highpriority · track · 0EPSS 0.002 · 10 %ileDEEUNLRUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.20% (10th) EPSS

CVSS 7 · high

Is it mine?

9 products

Check your exposure

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedMicrosoft Defender for Endpoint for Macmsrc_csaf
101.26042.0020:Security Update:https://docs.microsoft.com/en-us/microsoft-365/security/defender-endpoint/mac-updates?view=o365-worldwide
https://docs.microsoft.com/en-us/microsoft-365/security/defender-endpoint/mac-updates?view=o365-worldwide

cvss

Technical severity, 0–10. One row per scoring source.

7.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.4–7

v3.17highAV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.17highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 1 · impact 5.9

v3.16.4mediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · NCSC-NL NL

v3.17highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-367USCWE-367USCWE-367USCWE-367US

affected products (9)

Products and version ranges known to be affected.

Microsoft Defender for Endpoint for Macall versionscert_bundDEcpe:/a:microsoft:defender:for_endpoint_for_mac
Microsoft Malware Protection Engineall versionscert_bundDEcpe:/a:microsoft:malware_protection_engine:-
Microsoft Microsoft Defender for Endpoint for Mac101.0.0 → 101.26042.0020enisa_euvdEU
Microsoft Corp Microsoft Defender for Endpoint≤ 101.26042.0020fstec_bduRU
Microsoft Microsoft Defender for Endpoint for Macall versionsfixedmsrc_csafUS
Microsoft Microsoft Defender for Endpoint for Mac< 101.26042.0020msrc_csafUS
Microsoft Microsoft Defender for Endpoint for Mac≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Malware Protection Engine≤ vers:unknown/*ncsc_nlNL
microsoft defender for endpoint101.0.0 → 101.26042.0020nvdUScpe:2.3:a:microsoft:defender_for_endpoint:*:*:*:*:*:*:*:*

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2026-0236Kwetsbaarheden verholpen in Microsoft DefenderNL2026-07-14csaf · ncsc_nlNL
Microsoft heeft kwetsbaarheden verholpen in Defender.
WID-SEC-W-2026-2322Microsoft Malware Protection Engine und Defender: Mehrere SchwachstellenDeutsch2026-07-14csaf · cert_bundDE
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.
msrc_CVE-2026-50658Microsoft Defender for Endpoint for Mac Elevation of Privilege Vulnerability2026-07-14csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund msrc_csaf ncsc_nl nvd NVD CVE.org MITRE

published 2026-07-14modified 2026-10-24

references (3)

External citations — patches, advisories, analysis.

scry

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