CVE-2025-43539

Macos vulnerability

CVSS

8.8

EPSS

5.8%

EPSS pct

92th

Exploited

No known

The issue was addressed with improved bounds checks. This issue is fixed in iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Sequoia 15.7.3, macOS Sonoma 14.8.3, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, watchOS 26.2. Processing a file may lead to memory corruption.

Affected vendor

Apple

Affected product

Macos

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness type (CWE)

CWE-787 — Out-of-bounds Write
CWE-119 — Improper Restriction of Operations within Memory Bounds

Published

2025-12-12

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 5.8% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 92% of all scored CVEs.

Check your external exposure to CVE-2025-43539

Confirm whether Apple Macos is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2025-43539.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2025-43539

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2025-43539 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2025-43539?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2025-43539.

Start free scan

No credit card. Agentless.

Related vulnerabilities