# Microsoft Malware Protection Engine vulnerabilities

Source: https://junglewise.ai/threats/technologies/malware-protection-engine  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/malware-protection-engine.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in Microsoft Malware Protection Engine: 0 in the last 7 days and 0 in the last 90 days, 1 of them critical and 1 exploited in the wild. The most recent, CVE-2026-69414, was published on 14 August 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 4 (1 critical, 1 exploited in the wild)

## About Microsoft Malware Protection Engine

Microsoft's engine for detecting and protecting against malware threats.

## Latest Microsoft Malware Protection Engine vulnerabilities

- [CVE-2026-69414: Microsoft Defender Malware Protection Engine elevation of privilege](https://junglewise.ai/threats/cve-2026-69414-microsoft-defender-malware-protection-engine-elevation-of) (high, CVSS 7.8, published 14 Aug 2026)
- [CVE-2026-55012: Microsoft Malware Protection Engine integer overflow code execution](https://junglewise.ai/threats/cve-2026-55012-microsoft-malware-protection-engine-integer-overflow-code) (high, CVSS 7.8, published 14 Jul 2026)
- [CVE-2026-55011: Microsoft Defender integer underflow in Malware Protection Engine](https://junglewise.ai/threats/cve-2026-55011-microsoft-defender-integer-underflow-in-malware-protection-engine) (high, CVSS 7.8, published 14 Jul 2026)
- [CVE-2017-8540: Microsoft Malware Protection Engine Improper Restriction of Operations Vulnerability](https://junglewise.ai/threats/cve-2017-8540-microsoft-malware-protection-engine-improper-restriction-of) (critical, exploited in the wild, CVSS 7.8, published 3 Mar 2022)

## Most severe Microsoft Malware Protection Engine vulnerabilities

- [CVE-2017-8540: Microsoft Malware Protection Engine Improper Restriction of Operations Vulnerability](https://junglewise.ai/threats/cve-2017-8540-microsoft-malware-protection-engine-improper-restriction-of) (critical, exploited in the wild, CVSS 7.8, published 3 Mar 2022)
- [CVE-2026-69414: Microsoft Defender Malware Protection Engine elevation of privilege](https://junglewise.ai/threats/cve-2026-69414-microsoft-defender-malware-protection-engine-elevation-of) (high, CVSS 7.8, published 14 Aug 2026)
- [CVE-2026-55012: Microsoft Malware Protection Engine integer overflow code execution](https://junglewise.ai/threats/cve-2026-55012-microsoft-malware-protection-engine-integer-overflow-code) (high, CVSS 7.8, published 14 Jul 2026)
- [CVE-2026-55011: Microsoft Defender integer underflow in Malware Protection Engine](https://junglewise.ai/threats/cve-2026-55011-microsoft-defender-integer-underflow-in-malware-protection-engine) (high, CVSS 7.8, published 14 Jul 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Microsoft technologies

- [Microsoft Windows](https://junglewise.ai/threats/technologies/windows): 2,362 vulnerabilities
- [Microsoft Windows 10](https://junglewise.ai/threats/technologies/windows-10): 589 vulnerabilities
- [Microsoft Windows 11 24h2](https://junglewise.ai/threats/technologies/windows-11-24h2): 565 vulnerabilities
- [Microsoft Windows 11 25h2](https://junglewise.ai/threats/technologies/windows-11-25h2): 534 vulnerabilities
- [Microsoft Windows Server 2025](https://junglewise.ai/threats/technologies/windows-server-2025): 534 vulnerabilities
- [Microsoft Windows Server 2022](https://junglewise.ai/threats/technologies/windows-server-2022): 528 vulnerabilities
- [Microsoft Windows Server 2019](https://junglewise.ai/threats/technologies/windows-server-2019): 521 vulnerabilities
- [Microsoft Windows Server 2012](https://junglewise.ai/threats/technologies/windows-server-2012): 517 vulnerabilities
- [Microsoft Windows 11](https://junglewise.ai/threats/technologies/windows-11): 494 vulnerabilities
- [Microsoft Windows Server 2016](https://junglewise.ai/threats/technologies/windows-server-2016): 476 vulnerabilities
- [Microsoft Windows 10 1809](https://junglewise.ai/threats/technologies/windows-10-1809): 380 vulnerabilities
- [Microsoft Windows 10 21h2](https://junglewise.ai/threats/technologies/windows-10-21h2): 373 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Microsoft Malware Protection Engine vulnerabilities", https://junglewise.ai/threats/technologies/malware-protection-engine, 13 November 2026.