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Vulnerabilities

Security fix · CVE-2025-43421

Multiple issues were addressed by disabling array allocation sinking.

Published Nov 4, 2025 · catalog updated Apr 2, 2026 · Apple Safari

Last checked Oct 27, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-43421. EPSS is 0.65%. Act only if a listed version of Apple Safari is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium4.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.65%
Remediation
Version ranges on file
Affected products
vendor Apple Safari 0 <26.1

Multiple issues were addressed by disabling array allocation sinking. This issue is fixed in Safari 26.1, iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1, visionOS 26.1. Processing maliciously crafted web content may lead to an unexpected process crash.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Apple Safari 0 <26.10 <26.1

How to fix CVE-2025-43421

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-43421. EPSS is 0.65%. Act only if a listed version of Apple Safari is installed.

Which versions are affected?

Compare what you have installed with Apple Safari 0 <26.1 0 <26.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.65%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 4, 2025 · EUVD

    Detected

    Multiple issues were addressed by disabling array allocation sinking. This issue is fixed in Safari 26.1, iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1, visionOS 26.1. Processing maliciously crafted web content may lead to an unexpected process crash.

  2. Apr 2, 2026 · EUVD

    Updated

    Multiple issues were addressed by disabling array allocation sinking. This issue is fixed in Safari 26.1, iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1, visionOS 26.1. Processing maliciously crafted web content may lead to an unexpected process crash.

Sources

  • CVE.orgVulnerability recordCVE-2025-43421

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-43421

    30-day exploitation probability 0.65%

    first.org
  • EUVDVulnerability recordEUVD-2025-37690

    Multiple issues were addressed by disabling array allocation sinking. This issue is fixed in Safari 26.1, iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1, visionOS 26.1. Processing maliciously crafted web content may lead to an unexpected process crash.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 27, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 27, 2026
  • CVE.orgOct 24, 2026
  • EUVDOct 24, 2026