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CVE record · CVE-2025-43300

Out-of-bounds write in Apple iOS and iPadOS and others

CVSS 10.0 CriticalCriticalIn CISA KEVEPSS 0.65 · 99th percentile

Critical, because:

  • In CISA’s KEV catalogue since 21 Aug 2025: it is known to be exploited.
  • CVSS score 10.0: 9.0 or more.
  • CVSS score 10.0 (7.0 or more) and EPSS 0.65 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical

Published by the CVE Program (CNA: apple) at 21 Aug 2025, 00:27 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Apple iOS and iPadOS
  • affected before 15.8.5 custom
  • affected before 16.7.12 custom
  • affected before 18.6.2 custom
Apple iPadOS
  • affected before 17.7.10 custom
Apple macOS
  • affected before 13.7.8 custom
  • affected before 14.7.8 custom
  • affected before 15.6.1 custom
Identifiers
CVE-2025-43300
CNA
apple
Weakness (CWE)
CWE-787
Tags
Published
21 Aug 2025
Updated
2 Apr 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
10.0 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H ADP (CISA-ADP)
  • CISA KEV Listed since 21 Aug 2025: known to be exploited.
  • EPSS 0.65, the 99th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 21 Aug 2025. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.