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-2021-30952

CVE-2021-30952HIGH

Apple Multiple Products

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   R  U  H  H  H    8.8   .0696   93.9   YES

AFFECTED
  Product         Versions       Fixed
  watchOS         unspecified –  —
  iOS and iPadOS  unspecified –  —
  macOS           unspecified –  —
  macOS           unspecified –  —
  macOS           unspecified –  —

TIMELINE
  Apr 13  Reserved by apple
  Aug 24  Published (CNA: apple)
  Mar 5   Added to CISA KEV, remediation due 2026-03-26

CWE-190 · CNA: apple · CVSS v3.1 · 12 references · KEV due March 26, 2026

Description

An integer overflow was addressed with improved input validation. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing maliciously crafted web content may lead to arbitrary code execution.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
April 13, 2021	Reserved	Reserved by apple
August 24, 2021	Published	Published (CNA: apple)
March 5, 2026	KEV ADDED	Added to CISA KEV, remediation due 2026-03-26

Affected

Affected products and packages — 5 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Apple	watchOS	—	unspecified	—
Apple	iOS and iPadOS	—	unspecified	—
Apple	macOS	—	unspecified	—
Apple	macOS	—	unspecified	—
Apple	macOS	—	unspecified	—

Weaknesses

CWE-190

References (12)

http://www.openwall.com/lists/oss-security/2022/01/21/2 [mailing-list, x_refsource_MLIST]
https://cloud.google.com/blog/topics/threat-intelligence/coruna-powerful-ios-exploit-kit [third-party-advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/ [vendor-advisory, x_refsource_FEDORA]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/ [vendor-advisory, x_refsource_FEDORA]
https://support.apple.com/en-us/HT212975 [x_refsource_MISC]
https://support.apple.com/en-us/HT212976 [x_refsource_MISC]
https://support.apple.com/en-us/HT212978 [x_refsource_MISC]
https://support.apple.com/en-us/HT212980 [x_refsource_MISC]
https://support.apple.com/en-us/HT212982 [x_refsource_MISC]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30952 [government-resource]
https://www.debian.org/security/2022/dsa-5060 [vendor-advisory, x_refsource_DEBIAN]
https://www.debian.org/security/2022/dsa-5061 [vendor-advisory, x_refsource_DEBIAN]

Authoritative record: CVE-2021-30952 at cve.org

Vendors: apple

Weaknesses: CWE-190

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-30952 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.