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CVE-2023-43000

Apple Multiple products Use-After-Free

8.8 HIGHActively exploited (CISA KEV)Public exploitEPSS 4.04%
  1. Published5 Nov 2025
  2. Added to CISA KEV5 Mar 2026
  3. Remediation due26 Mar 2026
Actively exploited (CISA KEV)

Apple macOS, iOS, iPadOS, and Safari 16.6 contain a use-after-free vulnerability due to the processing of maliciously crafted web content that may lead to memory corruption.

Added to KEV: 5 Mar 2026Federal remediation due: 26 Mar 2026

Description

A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Ventura 13.5, iOS 16.6 and iPadOS 16.6, Safari 16.6, iOS 15.8.7 and iPadOS 15.8.7. Processing maliciously crafted web content may lead to memory corruption.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Apple Safari< 16.6
Apple iPadOS≥ 16.0 < 16.6 · < 15.8.7
Apple iPhone OS≥ 16.0 < 16.6 · < 15.8.7
Apple macOS< 13.5

Remediation

Fixed in
Apple Safari≥ 16.6
Apple iPadOS≥ 16.6
Apple iPhone OS≥ 16.6
Apple macOS≥ 13.5

References

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Frequently asked

Is CVE-2023-43000 being actively exploited?

Yes. CVE-2023-43000 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 5 Mar 2026.

How severe is CVE-2023-43000?

CVE-2023-43000 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 4.04% probability of exploitation.

Which products are affected by CVE-2023-43000?

Affected products include Apple Safari, Apple iPadOS, Apple iPhone OS, Apple macOS.

How do I fix CVE-2023-43000?

Upgrade affected software to a fixed version, for example Apple Safari 16.6, Apple iPadOS 16.6, Apple iPhone OS 16.6 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-43000 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.