Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-30657

CVE-2021-30657MEDIUM

Apple macOS

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   N   R  U  N  H  N    5.5   .6853   99.3   YES

AFFECTED
  Product  Versions       Fixed
  macOS    unspecified –  —
  macOS    unspecified –  —

TIMELINE
  Apr 13  Reserved by apple
  Sep 8   Published (CNA: apple)
  Nov 3   Added to CISA KEV, remediation due 2021-11-17

CWE-862 · CNA: apple · CVSS v3.1 · 3 references · KEV due November 17, 2021

Description

A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina. A malicious application may bypass Gatekeeper checks. Apple is aware of a report that this issue may have been actively exploited..

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
April 13, 2021	Reserved	Reserved by apple
September 8, 2021	Published	Published (CNA: apple)
November 3, 2021	KEV ADDED	Added to CISA KEV, remediation due 2021-11-17

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Apple	macOS	—	unspecified	—
Apple	macOS	—	unspecified	—

Weaknesses

CWE-862

References (3)

https://support.apple.com/en-us/HT212325 [x_refsource_MISC]
https://support.apple.com/en-us/HT212326 [x_refsource_MISC]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30657 [government-resource]

Authoritative record: CVE-2021-30657 at cve.org

Vendors: apple

Weaknesses: CWE-862

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-30657 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 Sunday, October 4, 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.