CVE-2026-20687 - Vulnerability Analysis

Overview

Apple iOS 18.7.7, iPadOS 18.7.7, iOS 26.4, iPadOS 26.4, macOS Sequoia 15.7.5, macOS Tahoe 26.4, tvOS 26.4, and watchOS 26.4 contain a use after free vulnerability caused by improper memory management, letting apps cause system termination or write kernel memory, exploit requires malicious app execution.

Severity & Score

Impact

Malicious apps can cause system crashes or write kernel memory, potentially leading to denial of service or privilege escalation.

Mitigation

Update to iOS 18.7.7, iPadOS 18.7.7, iOS 26.4, iPadOS 26.4, macOS Sequoia 15.7.5, macOS Tahoe 26.4, tvOS 26.4, and watchOS 26.4.

References

• https://support.apple.com/en-us/126792
• https://support.apple.com/en-us/126793
• https://support.apple.com/en-us/126794
• https://support.apple.com/en-us/126795
• https://support.apple.com/en-us/126797
• https://support.apple.com/en-us/126798

Social Media Activity(2 posts)

Offensive Sequence

@offseq

Mar 25, 2026

CVE-2026-20687 (CRITICAL): Use-after-free in Apple iOS/iPadOS/macOS/tvOS/watchOS lets malicious apps crash devices or write kernel memory. Patch to iOS/iPadOS 18.7.7/26.4, macOS Sequoia 15.7.5, Tahoe 26.4+ ASAP. https://radar.offseq.com/threat/cve-2026-20687-an-app-may-be-able-to-cause-unexpec-a39ac789 #OffSeq #AppleSecurity #InfoSec

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Offensive Sequence

@offseq

Mar 25, 2026

CVE-2026-20687 (CRITICAL): Use-after-free in Apple iOS/iPadOS/macOS/tvOS/watchOS lets malicious apps crash devices or write kernel memory. Patch to iOS/iPadOS 18.7.7/26.4, macOS Sequoia 15.7.5, Tahoe 26.4+ ASAP. https://radar.offseq.com/threat/cve-2026-20687-an-app-may-be-able-to-cause-unexpec-a39ac789 #OffSeq #AppleSecurity #InfoSec

View original post

GitHub Repositories(1 repo)

• https://github.com/zeroxjf/CVE-2026-20687-AppleSEPKeyStore-UAF

Related Resources

• Vulnerability Intelligence Dashboard
• Credential Scanner