Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Microsoft Defender Elevation of Privilege Vulnerability
AV AC PR UI S C I A CVSS EPSS %ile KEV
L H L N U H H H 7.0 .1075 95.5 —
AFFECTED
Product Versions Fixed
Microsoft Malware Protection Engine 1.1.0.0 – —
TIMELINE
Jun 5 Reserved by microsoft
Jun 16 Published (CNA: microsoft)
Aug 12 RESCORED — CVE-2026-50656 (Microsoft Malware Protection Engine). CVSS 7.8 → 7 (NVD).
Aug 13 EXPLOIT PUBLISHED — CVE-2026-50656 (Microsoft Malware Protection Engine). Public exploit reference added.
Description
Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "RoguePlanet ".
Lifecycle
Complete event history — 4 events, chronological
| Date | Event | Detail |
|---|
| June 5, 2026 | Reserved | Reserved by microsoft |
| June 16, 2026 | Published | Published (CNA: microsoft) |
| August 12, 2026 | RESCORED | RESCORED — CVE-2026-50656 (Microsoft Malware Protection Engine). CVSS 7.8 → 7 (NVD). |
| August 13, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-50656 (Microsoft Malware Protection Engine). Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Microsoft | Microsoft Malware Protection Engine | — | 1.1.0.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-50656 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.