CVE-2025-43520

MEDIUM

5.5

CVSS Score

Published: December 12, 2025 at 08:56 PM UTC

Updated: October 7, 2026 at 11:10 AM UTC

6 products affected across 1 vendormacOSiPhone OSiPadOS

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Severity

MEDIUM5.5

Exploitation

CISA KEV

Exploit prediction

EPSS 0.4%

SSVC

Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score0.4%

EPSS (Exploit Prediction Scoring System) estimates a 0.4% chance this CVE is exploited in the wild within the next 30 days — higher than 37% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

Apple watchOS, iOS, iPadOS, macOS, visionOS, and tvOS contain a classic buffer overflow vulnerability which could allow a malicious application to cause unexpected system termination or write kernel memory.

Required Action

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

Ransomware Use

Unknown

Added to KEV

Mar 20, 2026

Remediation Due

Apr 3, 2026

206 days overdue

Notes

https://support.apple.com/en-us/125632

https://support.apple.com/en-us/125633

https://support.apple.com/en-us/125634

https://support.apple.com/en-us/125635

https://support.apple.com/en-us/125636

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

https://support.apple.com/en-us/125638

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

https://nvd.nist.gov/vuln/detail/CVE-2025-43520

Description

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

Affected

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

iPadOS · Apple

95%

v < 18.7.2v < 26.126.0

Affected range stops below 18.7.2, so it looks safe — our inference, not a vendor statement

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

iPhone OS · Apple

95%

v < 18.7.226.0

Affected range stops below 18.7.2, so it looks safe — our inference, not a vendor statement

macOS · Apple

95%

v < 14.8.2v < 15.7.2v < 26.114.0 ≤ v < 14.8.215.0 ≤ v < 15.7.226.0

Affected range stops below 14.8.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.7.2, so it looks safe — our inference, not a vendor statement

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

tvOS · Apple

95%

v < 26.1

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

visionOS · Apple

95%

v < 26.1

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

watchOS · Apple

95%

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. What the record does show:

Patch and advisory references

References (10)

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/125636

Release NotesVendor Advisory

Source: cverecord

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

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/125634

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/125638

Release NotesVendor Advisory

Source: cverecord

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

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/125635

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/125632

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/125633

SSVC — Action Prioritization

SSVCActiveNot automatableTotal impact

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

CVSS

5.5MEDIUMCISA-ADP

Attack Vector: LOCAL
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusANALYZED

CWE

CWE-120

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