[UPDATE] [high] Microsoft Malware Protection Engine: Vulnerability allows privilege escalation

highCVE-2026-50656

A local attacker can exploit a vulnerability in Microsoft Malware Protection Engine and Microsoft Defender to elevate their privileges.

CSIRTS triage

vendor: Microsoft product: Microsoft Malware Protection Engine Privilege escalation

What: A local attacker can exploit a vulnerability in Microsoft Malware Protection Engine and Microsoft Defender to elevate their privileges.
Who is affected: Local attackers using affected versions of Microsoft Malware Protection Engine and Microsoft Defender.
Urgency: Remediation is urgent due to the high severity of the privilege escalation vulnerability.
Action: Apply the latest security updates to Microsoft Malware Protection Engine.

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: 2026-07-10
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-2026-1976

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.

Moderate exploitation riskCVE-2026-506563.4% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 87% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-50656	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

highCVE-2026-50656: Microsoft Defender Elevation of Privilege Vulnerabilitymsrc

Recent advisories for Microsoft Malware Protection Engine

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.

criticalexploitedCVE-2017-8540: Microsoft Malware Protection Engine Improper Restriction of Operations Vulnerabilitycisa-kev · 2022-03-03