CVE-2026-20700

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 Metrics

• v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.30%• Percentile: 53%

Techniques & Countermeasures

• CWE-119•Improper Restriction of Operations within the Bounds of a Memory Buffer

  The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Affected Systems

• Unknown•iOS and iPadOS

  ≥ unspecified, < 26.3 | < 26.3

• apple•ipados

  < 26.3

• apple•iphone_os

  < 26.3

• Unknown•macOS

  ≥ unspecified, < 26.3 | < 26.3

• apple•tvos

  ≥ unspecified, < 26.3 | < 26.3

• apple•visionos

  ≥ unspecified, < 26.3 | < 26.3

• apple•watchos

  ≥ unspecified, < 26.3 | < 26.3

References (6)

• https://support.apple.com/en-us/126348
• https://support.apple.com/en-us/126352
• https://support.apple.com/en-us/126353
• https://support.apple.com/en-us/126346
• https://support.apple.com/en-us/126351
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20700