CVE-2025-43400

MEDIUM

6.3

CVSS Score

Published: September 29, 2025 at 06:03 PM UTC

Updated: October 18, 2026 at 09:10 PM UTC

6 products affected across 1 vendormacOSiPhone OSiPadOS

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Severity

MEDIUM6.3

Exploit prediction

EPSS 7%

SSVC

No known exploit

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sonoma 14.8.1, macOS Tahoe 26.0.1, macOS Sequoia 15.7.1, visionOS 26.0.1, iOS 26.0.1 and iPadOS 26.0.1, iOS 18.7.1 and iPadOS 18.7.1. Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

iPadOS · Apple

95%

v < 18.7.126.0

Affected range stops below 18.7.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 26.0.1, so it looks safe — our inference, not a vendor statement

iPhone OS · Apple

95%

v < 18.7.126.0

macOS · Apple

95%

14.0 ≤ v < 14.8.115.0 ≤ v < 15.7.126.0

Affected range stops below 14.8.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.7.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 26.0.1, so it looks safe — our inference, not a vendor statement

visionOS · Apple

95%

v < 26.0.1

Affected range stops below 26.0.1, so it looks safe — our inference, not a vendor statement

tvOS · Apple

90%

0 ≤ v < 26.1

Affected range stops below 26.1, so it looks safe — our inference, not a vendor statement

watchOS · Apple

90%

0 ≤ v < 26.1

Affected range stops below 26.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (11)

Source: [email protected]

https://support.apple.com/en-us/125326

Source: [email protected]

https://support.apple.com/en-us/125327

Source: [email protected]

https://support.apple.com/en-us/125328

Source: [email protected]

https://support.apple.com/en-us/125329

Source: [email protected]

https://support.apple.com/en-us/125330

Source: [email protected]

https://support.apple.com/en-us/125338

Source: cverecord

https://support.apple.com/en-us/125637

Source: cverecord

https://support.apple.com/en-us/125639

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.3MEDIUMCISA-ADP

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: LOW
Integrity: LOW
Availability: LOW

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-787

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