CVE-2025-43400

MEDIUM
2025-09-29 [email protected]
6.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

Lifecycle Timeline

2
Analysis Generated
Mar 28, 2026 - 19:14 vuln.today
CVE Published
Sep 29, 2025 - 18:15 nvd
MEDIUM 6.3

Tags

Memory Corruption Buffer Overflow Apple

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in watchOS 26.1, tvOS 26.1. Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory.

Analysis

An out-of-bounds write issue was addressed with improved bounds checking. Rated medium severity (CVSS 6.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical Context

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in watchOS 26.1, tvOS 26.1. Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory. Affected products include: Apple Ipados, Apple Iphone Os, Apple Macos, Apple Visionos.

Affected Products

Apple Ipados, Apple Iphone Os, Apple Macos, Apple Visionos.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +32
POC: 0

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CVE-2025-43400 vulnerability details – vuln.today
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