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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 this report.

Scores

7.8
CVSS 7.8 out of 10, high severity.
1.4%
EPSS 1.4% chance of exploitation in the next 30 days.

The facts

Published
11 February 2026
Last changed
17 June 2026
NVD status
Analyzed
Severity
High, CVSS 7.8 out of 10 (version 3.1)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
Affects
  • apple ipados
  • apple iphone os
  • apple macos
  • apple tvos
  • apple visionos
Known exploited
Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 12 February 2026.
EPSS
1.4% chance of exploitation activity in the next 30 days (percentile 72).

Is there a Securelyn advisory?

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References