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.
Apache HTTP Server
CVSS EPSS %ile KEV
— .9996 100.0 YES
AFFECTED
Product Versions Fixed
HTTP Server unspecified —
TIMELINE
Nov 3 Added to CISA KEV, remediation due 2021-11-17
Nov 3 Published
Lifecycle
Complete event history — 2 events, chronological
| Date | Event | Detail |
| November 3, 2021 | KEV ADDED | Added to CISA KEV, remediation due 2021-11-17 |
| November 3, 2021 | Published | Published |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| Apache | HTTP Server | — | — | — |
References
No references recorded.
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-42013 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.