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CVE record · CVE-2025-43421

Out-of-bounds read in Apple Safari and others

CVSS 4.3 MediumEPSS 0.0065 · 51st percentile

Published by the CVE Program (CNA: apple) at 4 Nov 2025, 01:17 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 Safari
  • affected before 26.1 custom
Apple iOS and iPadOS
  • affected before 26.1 custom
Apple macOS
  • affected before 26.1 custom
Apple visionOS
  • affected before 26.1 custom
Identifiers
CVE-2025-43421
CNA
apple
Weakness (CWE)
CWE-125 · CWE-787
Tags
Published
4 Nov 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
4.3 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L ADP (CISA-ADP)
  • CISA KEV Not listed.
  • EPSS 0.0065, the 51st 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 4 Nov 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.