Vulnerability 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 this report.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apple | Ipados | < 26.3 |
| Apple | Iphone Os | < 26.3 |
| Apple | Macos | < 26.3 |
| Apple | Tvos | < 26.3 |
| Apple | Visionos | < 26.3 |
| Apple | Watchos | < 26.3 |
Related Weaknesses (CWE)
References
- https://support.apple.com/en-us/126346Release NotesVendor Advisory
- https://support.apple.com/en-us/126348Release NotesVendor Advisory
- https://support.apple.com/en-us/126351Release NotesVendor Advisory
- https://support.apple.com/en-us/126352Release NotesVendor Advisory
- https://support.apple.com/en-us/126353Release NotesVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-US Government Resource
FAQ
What is CVE-2026-20700?
CVE-2026-20700 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 memo...
How severe is CVE-2026-20700?
CVE-2026-20700 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-20700?
Check the references section above for vendor advisories and patch information. Affected products include: Apple Ipados, Apple Iphone Os, Apple Macos, Apple Tvos, Apple Visionos.