CVE-2025-43520
HIGH CISA KEVCVSS v3
7.1
HIGH
EPSS Score
0.0%
exploit probability
CISA KEV
Yes
known exploited
Exploitation
—
SSVC status
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.
CISA Known Exploited Vulnerability
- Date Added
- 3/20/2026
- Patch Due Date
- 4/3/2026
- 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.
Technical Details
- CVSS v3 Vector
- 3.1
- Published
- 12/12/2025
- Last Modified
- 12/16/2025
Frequently Asked Questions
What is CVE-2025-43520?
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.
Is CVE-2025-43520 actively exploited?
Yes. CVE-2025-43520 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 4/3/2026.
What is the CVSS score for CVE-2025-43520?
CVE-2025-43520 has a CVSS v3 base score of 7.1 (HIGH severity), with vector string 3.1.
Is CVE-2025-43520 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.