What’s Vulnerable › Vulnerabilities

CVE-2026-20700: Apple Multiple Buffer Overflow Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2026-02-12
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-11 · updated 2026-06-17
• Weakness: CWE-119

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.

Affected products

• Apple iPadOS: before 26.3 — fixed in 26.3
• Apple Iphone Os: before 26.3 — fixed in 26.3
• Apple macOS: before 26.3 — fixed in 26.3
• Apple tvOS: before 26.3 — fixed in 26.3
• Apple visionOS: before 26.3 — fixed in 26.3
• Apple watchOS: before 26.3 — fixed in 26.3

How to fix

Upgrade to a fixed version: 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. Check the vendor advisory for mitigations.

References

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

Get alerted when CVE-2026-20700 or the next vulnerability affects your stack