CVE-2026-20700
HIGH CISA KEV Actively ExploitedMemory Corruption Allows Arbitrary Code Execution on Apple Operating Systems
CVSS v3
7.8
HIGH
EPSS Score
0.4%
exploit probability
CISA KEV
Yes
known exploited
Exploitation
active
SSVC status
Description
A memory corruption issue was addressed with improved state management. This issue is fixed in iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. An attacker with memory write capability may be able to execute arbitrary code. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 and CVE-2025-43529 were also issued in response to
CISA Known Exploited Vulnerability
- Date Added
- 2/12/2026
- Patch Due Date
- 3/5/2026
- 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
- 2/11/2026
- Last Modified
- 3/25/2026
Frequently Asked Questions
What is CVE-2026-20700?
A memory corruption issue was addressed with improved state management. This issue is fixed in iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. An attacker with memory write capability may be able to execute arbitrary code. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 and CVE-2025-43529 were also issued in response to
Is CVE-2026-20700 actively exploited?
Yes. CVE-2026-20700 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 3/5/2026.
What is the CVSS score for CVE-2026-20700?
CVE-2026-20700 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string 3.1.
Is CVE-2026-20700 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.