---
title: "CVE-2023-43000: Apple Multiple products Use-After-Free Vulnerability"
url: https://erroneo.us/security/cve/CVE-2023-43000/
description: "CVE-2023-43000 (Apple Multiple Products): Exploited in the wild (CISA KEV). A use-after-free issue was addressed with improved memory management. This issue…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-11-05
date_modified: 2026-09-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2023-43000"
kev: true
cvss: 8.8
epss: 0.04042
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2023-43000: Apple Multiple products Use-After-Free Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Apple Multiple Products. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-03-05, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-03-26 ; treat that as the outer limit, not the target.
- EPSS 4.0% , percentile 91: FIRST’s model estimates a 4.0% chance of exploitation activity in the next 30 days, higher than 91% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.

## What it is

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.

## Affected products (CVE record)

- Apple macOS: unspecified < 13.5
- Apple iOS and iPadOS: unspecified < 16.6
- Apple Safari: unspecified < 16.6
- Apple iOS and iPadOS: unspecified < 15.8.7

## Severity

- CISA-ADP CVSS 3.1: 8.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2026-03-05; federal due date 2026-03-26. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 4.04% probability of exploitation activity in the next 30 days; percentile 91.

## Sources

- [Listed in CISA KEV notes (support.apple.com)](https://support.apple.com/en-us/120324)
- [Listed in CISA KEV notes (support.apple.com)](https://support.apple.com/en-us/120331)
- [Listed in CISA KEV notes (support.apple.com)](https://support.apple.com/en-us/120338)
- [CVE.org record CVE-2023-43000](https://www.cve.org/CVERecord?id=CVE-2023-43000)
- [NVD entry CVE-2023-43000](https://nvd.nist.gov/vuln/detail/CVE-2023-43000)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-43000)
- [support.apple.com](https://support.apple.com/en-us/126632)
- [cloud.google.com](https://cloud.google.com/blog/topics/threat-intelligence/coruna-powerful-ios-exploit-kit)

---
Source page: https://erroneo.us/security/cve/CVE-2023-43000/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt