Microsoft Defender Elevation of Privilege Vulnerability
Priority HIGH 69CWE-59Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.
Summary
Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "RoguePlanet ".
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.11163 95th percentileScored 2026-11-07
Fix Fixed Microsoft Malware Protection Engine (Microsoft): 1.1.26060.3008
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Microsoft Malware Protection Engine (Microsoft) Fixed in 1.1.26060.3008
Vendor assessments
Microsoft
Microsoft's page for this CVE →
- Impact
- Elevation of Privilege
- Exploited
- No
- Publicly disclosed
- Yes
- Exploitability
- Exploitation More Likely
| Product | Status | Plan or fix |
|---|---|---|
| Microsoft Malware Protection Engine | Fixed | 1.1.26060.3008 · Security Update |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-50656
- 2026-10-03 Alias added: GHSA-hgx9-224c-3p2x
- 2026-10-25 EPSS moved to the 95th–99th percentile
References
More Microsoft Malware Protection Engine vulnerabilities
- TI-2026-29727 Microsoft Defender Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 7.8
- TI-2017-06074 Out-of-bounds write in Microsoft Malware Protection Engine KEVCVSS 3.1HIGH 7.8
- TI-2017-00265 Memory corruption in Microsoft Malware Protection Engine CVSS 3.0HIGH 7.8
- TI-2026-48742 Microsoft Defender Elevation of Privilege Vulnerability CVSS 3.1HIGH 7.8
- TI-2017-06072 Memory corruption in Microsoft Malware Protection Engine CVSS 3.0HIGH 7.8
- TI-2017-06075 Memory corruption in Microsoft Malware Protection Engine CVSS 3.0HIGH 7.8
Sources
- CVE-2026-50656 · CVE Program
- CVE-2026-50656 · NVD
- FIRST EPSS
- GHSA-hgx9-224c-3p2x · GitHub Advisory Database · CC BY 4.0
- CVE-2026-50656 · Microsoft Security Update Guide
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences