Threat Intelligence / CVE / CVE-2023-23529

CVE-2023-23529 — Apple Safari

CISA KEV

CVSS v3.1 8.8 (HIGH) · EPSS 0.0% (higher than 26.0% of all scored CVEs) · Priority 9/10 · Published 2023-02-27

As of 2025-10-23, CVE-2023-23529 is a HIGH-severity vulnerability in Apple Safari, CVSS v3.1 8.8, EPSS 0.0% (26.0th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-02-14), with a US federal remediation deadline of 2023-03-07. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2023-23529, most recently “Coruna iOS Exploit Kit — 23 Exploits Across 5 Chains Targeting iOS 13-17.2.1 (CVE-2021-30952, CVE-2023-41974, CVE-2023-43000 + 20 More)”.

Last updated: 2025-10-23

What is CVE-2023-23529?

A type confusion issue was addressed with improved checks. This issue is fixed in iOS 15.7.4 and iPadOS 15.7.4, iOS 16.3.1 and iPadOS 16.3.1, macOS Ventura 13.2.1, Safari 16.3. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

The record classifies CVE-2023-23529 under weakness class CWE-843. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 4 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 1294 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 8.8 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (FIRST): 0.0% probability of exploitation in the next 30 days, higher than 26.0% of all scored CVEs
CISA KEV: Listed since 2023-02-14, federal remediation deadline 2023-03-07
Threadlinqs priority: 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
Published: 2023-02-27, last modified 2025-10-23

Is CVE-2023-23529 being exploited?

CISA added CVE-2023-23529 to the Known Exploited Vulnerabilities catalog on 2023-02-14, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2023-03-07 under BOD 22-01. It currently carries a trending score of 22 in the Threadlinqs vulnerability feed.

Affected products and versions

Apple: Safari, Ipados, Iphone Os, Macos

How to fix CVE-2023-23529

The record marks a vendor fix as available for CVE-2023-23529. Patch reference: https://support.apple.com/en-us/HT213638. Vendor advisory: https://support.apple.com/en-us/HT213633. Because CVE-2023-23529 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2023-03-07. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2023-23529

1 tracked threat in the Threadlinqs corpus references CVE-2023-23529, either in the campaign’s CVE list or as an indicator on the campaign record.

Coruna iOS Exploit Kit — 23 Exploits Across 5 Chains Targeting iOS 13-17.2.1 (CVE-2021-30952, CVE-2023-41974, CVE-2023-43000 + 20 More) — CRITICAL · 2026-03-06

Sources

Seeded from nvd and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2023-23529 are available via the Threadlinqs MCP server (Purple tier). View plans →

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