CVE-2025-43520
Apple Multiple Products Classic Buffer Overflow Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 3 April 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.43% probability · 37th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 20 March 2026 · due 3 April 2026
- Weakness
- CWE-120
- Affected
- apple/ipados · apple/iphone os · apple/macos · apple/tvos · apple/visionos · apple/watchos
- Source
- product-security@apple.com
EPSS 0.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. 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
References
- https://support.apple.com/en-us/125632Release Notes, Vendor Advisory
- https://support.apple.com/en-us/125633Release Notes, Vendor Advisory
- https://support.apple.com/en-us/125634Release Notes, Vendor Advisory
- https://support.apple.com/en-us/125635Release Notes, Vendor Advisory
- https://support.apple.com/en-us/125636Release Notes, Vendor Advisory
- https://support.apple.com/en-us/125637Release Notes, Vendor Advisory
- https://support.apple.com/en-us/125638Release Notes, Vendor Advisory
- https://support.apple.com/en-us/125639Release Notes, Vendor Advisory
- https://cloud.google.com/blog/topics/threat-intelligence/darksword-ios-exploit-chain/Technical Description
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43520US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.