Reference page — cumulative record through Wednesday, October 7, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

Microsoft Malware Protection Engine

Product reference — Microsoft Malware Protection Engine by Microsoft · sector: Operating Systems & Platforms. Cumulative disclosure record for this product across the archive.

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Product totals

Disclosures & known-exploited
	All-time	YTD
CVEs	10	6
KEV entries	1	1

Rate & severity
KEV/100	Med CVSS	Med EPSS	C	H	M	L
10.0	7.8	.0049	0	10	0	0

KEV/100 = KEV entries ÷ CVEs × 100. Med CVSS / Med EPSS are medians over this product's disclosures. C/H/M/L = disclosures by CVSS severity band.

Monthly disclosures

Trend (by first-seen month, full archive): █▅▁▁▅▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▅█▅▁▁

Last 12 months (new CVEs by first-seen day)
Month	New CVEs
2025-11	0
2025-12	0
2026-01	0
2026-02	0
2026-03	0
2026-04	0
2026-05	2
2026-06	1
2026-07	2
2026-08	1
2026-09	0
2026-10	0

Notable CVEs

Ranked by the published formula: KEV → EPSS → CVSS → CVE ID.

Notable (ranked)
CVE	CVSS	EPSS %ile	Severity	KEV	First seen
CVE-2026-41091	7.8	36.4	HIGH	YES	2026-05-20
CVE-2021-42298	7.8	92.9	HIGH	—	2021-11-10
CVE-2021-34522	7.8	85.6	HIGH	—	2021-07-14
CVE-2021-34464	7.8	85.1	HIGH	—	2021-07-16
CVE-2026-45584	8.1	51.9	HIGH	—	2026-05-20
CVE-2021-34471	7.8	41.5	HIGH	—	2021-08-12
CVE-2026-55011	7.8	38.3	HIGH	—	2026-07-14
CVE-2026-55012	7.8	38.3	HIGH	—	2026-07-14
CVE-2026-50656	7.0	28.4	HIGH	—	2026-06-16
CVE-2026-69414	7.8	23.6	HIGH	—	2026-08-14

Recent CVEs

Most recently seen
CVE	CVSS	EPSS %ile	Severity	KEV	First seen
CVE-2026-69414	7.8	23.6	HIGH	—	2026-08-14
CVE-2026-55012	7.8	38.3	HIGH	—	2026-07-14
CVE-2026-55011	7.8	38.3	HIGH	—	2026-07-14
CVE-2026-50656	7.0	28.4	HIGH	—	2026-06-16
CVE-2026-45584	8.1	51.9	HIGH	—	2026-05-20
CVE-2026-41091	7.8	36.4	HIGH	YES	2026-05-20
CVE-2021-42298	7.8	92.9	HIGH	—	2021-11-10
CVE-2021-34471	7.8	41.5	HIGH	—	2021-08-12
CVE-2021-34464	7.8	85.1	HIGH	—	2021-07-16
CVE-2021-34522	7.8	85.6	HIGH	—	2021-07-14

KEV entries

CISA Known Exploited Vulnerabilities (newest addition first)
CVE	KEV added	CVSS	EPSS %ile	Severity
CVE-2026-41091	2026-05-20	7.8	36.4	HIGH

Vendor: Microsoft — all products and the full vendor record.

Methodology

A product is a (vendor, product) pair as named in the affected-product data. Rate statistics are arithmetic over published figures. Counts key to first-seen day. Raw counts are not comparable across products; this is a reference page assembled from the public record, not a ranking by our judgment.

Sources. CVE Program (cvelistV5), NVD (NIST), CISA KEV, FIRST EPSS.