ThreatRoundup

CVE-2025-43520: Apple Multiple Products (Medium, CVSS 5.5)

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Detection content in our coverage: IOCs

CVE record · updated

CVE-2025-43520MediumKEVPublic exploitApple Multiple Products
CVSS
5.5 Medium (v3.1)
EPSS
0.4% chance of exploitation in the next 30 days (higher than 36.9% of CVEs)
Exploited in the wild
Yes, on CISA’s KEV list since Mar 20, 2026
Public exploit
Yes, reported in 1 GitHub repository
Weakness
CWE-120
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Published
Dec 12, 2025
CISA fix-by date
Apr 3, 2026 (for US federal agencies)

What it is

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. A malicious application may be able to cause unexpected system termination or write kernel memory.

Description from the National Vulnerability Database.

What to do

CISA: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Check whether you run Apple Multiple Products, then apply the vendor’s fix or mitigation from the advisories below. Because this flaw is exploited or has public exploit code, treat it as urgent and check for signs of compromise, not just the patch level.

Advisories and fixes

ThreatRoundup coverage

Sources: NVD, FIRST EPSS, CISA KEV, and public exploit databases (availability only). ThreatRoundup reports whether public exploit code exists but never links to it: fake proof-of-concepts that infect security researchers are common. This page updates automatically.