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

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

CSIRTS triage

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.

⚡ Watch Microsoft Malware Protection Engine

Get an email when a new Microsoft Malware Protection Engine advisory drops — max one per day, one-click unsubscribe.

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

Elevated exploitation riskCVE-2026-5065610.7% 30-day exploitation probability — well above the norm. Schedule remediation this cycle. Riskier than 96% of all EPSS-scored CVEs.

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

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