[NEW] [UNPATCHED] [high] Microsoft Malware Protection Engine and Defender: Vulnerability enables gaining administrator rights

highpublic exploitCVE-2026-69414

A local attacker can exploit a vulnerability in Microsoft Defender and Microsoft Malware Protection Engine to gain administrator rights.

CSIRTS triage

vendor: Microsoft product: Malware Protection Engine and Defender Privilege escalation

What: A vulnerability in Microsoft Defender and Malware Protection Engine enables local privilege escalation to administrator rights.
Who is affected: Windows systems running Microsoft Defender or Malware Protection Engine are affected.
Urgency: High severity and unpatched status; local privilege escalation directly compromises system security.
Action: Apply Microsoft security patch immediately for CVE-2026-69414.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: high
Published: 2026-08-17
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2856

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-694140.23% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-69414	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Microsoft Malware Protection

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-69414: Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in …nvd · 2026-08-14
medium[NEW] [medium] Microsoft Malware Protection Engine and Defender: Multiple vulnerabilitiescert-bund · 2026-07-15
high[UPDATE] [high] Microsoft Malware Protection Engine: Vulnerability allows privilege escalationcert-bund · 2026-07-10
criticalexploitedCVE-2017-8540: Microsoft Malware Protection Engine Improper Restriction of Operations Vulnerabilitycisa-kev · 2022-03-03