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.
CVSS EPSS %ile KEV — .3939 98.5 YES
AFFECTED Product Versions Fixed Defender unspecified —
TIMELINE Nov 3 Added to CISA KEV, remediation due 2021-11-17 Nov 3 Published
| Date | Event | Detail |
|---|---|---|
| November 3, 2021 | KEV ADDED | Added to CISA KEV, remediation due 2021-11-17 |
| November 3, 2021 | Published | Published |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| Microsoft | Defender | — | — | — |
No references recorded.
Authoritative record: CVE-2021-1647 at cve.org
Vendors: microsoft
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-1647 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.