Reference page — cumulative record through Thursday, October 8, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-39300

CVE-2021-39300HIGH

n/a BUSINESS NOTEBOOK PCS BIOS; BUSINESS DESKTOP PCS BIOS; RETAIL POINT-OF-SALE SYSTEMS BIOS; WORKSTATIONS BIOS — Potential vulnerabilities have been identified in UEFI firmware (BIOS) for some PC products which may allow escalation of privilege and a…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  C  H  H  H    8.8   .0042   34.6     —

AFFECTED
  Product                                                                                                      Versions           Fixed
  BUSINESS NOTEBOOK PCS BIOS; BUSINESS DESKTOP PCS BIOS; RETAIL POINT-OF-SALE SYSTEMS BIOS; WORKSTATIONS BIOS  before 01.12.00 –  —

TIMELINE
  Aug 19  Reserved by hp
  Feb 16  Published (CNA: hp)
  Oct 7   RESCORED — CVE-2021-39300 (BUSINESS NOTEBOOK PCS BIOS; BUSINESS DESKTOP PCS BIOS; RETAIL POINT-OF-SALE SYSTEMS BIOS; WORKSTATIONS BIOS). CVSS 7.3 → 8.8 (NVD).

CWE-269 · CNA: hp · CVSS v3.1 · 1 reference · NVD status: Modified

Description

Potential vulnerabilities have been identified in UEFI firmware (BIOS) for some PC products which may allow escalation of privilege and arbitrary code execution.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 19, 2021	Reserved	Reserved by hp
February 16, 2022	Published	Published (CNA: hp)
October 7, 2026	RESCORED	RESCORED — CVE-2021-39300 (BUSINESS NOTEBOOK PCS BIOS; BUSINESS DESKTOP PCS BIOS; RETAIL POINT-OF-SALE SYSTEMS BIOS; WORKSTATIONS BIOS). CVSS 7.3 → 8.8 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	BUSINESS NOTEBOOK PCS BIOS; BUSINESS DESKTOP PCS BIOS; RETAIL POINT-OF-SALE SYSTEMS BIOS; WORKSTATIONS BIOS	—	before 01.12.00	—

Weaknesses

CWE-269

References (1)

https://support.hp.com/us-en/document/ish_5661066-5661090-16 [Patch, Vendor Advisory]

Authoritative record: CVE-2021-39300 at cve.org

Weaknesses: CWE-269

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-39300 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 Thursday, October 8, 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.