CVE WatchNov 5, 2026

CVE-2024-27834

Apple Multiple Products Improper Authentication Vulnerability

CVSS

5.5

Medium

EPSS

0.6%

p49

KEV

YES

Nov 4, 2026

Exploit Today

0-100

Published: May 14, 2024 · Last modified: Nov 5, 2026 · CWE-287

EPSS · 30d

0.6%EPSS · 30 days0.6%

2026-10-072026-11-04

KEV catalog record

Product

Apple / Multiple Products

Vulnerability

Apple Multiple Products Improper Authentication Vulnerability

Added to KEV

Nov 4, 2026

Remediate by

Nov 18, 2026

Known ransomware use

Summary description

Apple iOS, iPadOS, macOS, Safari, tvOS and watchOS 10.5 contain an improper authentication vulnerability which could allow an attacker with arbitrary read and write capability to bypass pointer authentication.

Required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Notes

https://support.apple.com/en-us/120896 ; https://support.apple.com/en-us/120898 ; https://support.apple.com/en-us/120901 ; https://support.apple.com/en-us/120902 ; https://support.apple.com/en-us/120903 ; https://support.apple.com/en-us/120905 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2024-27834

Technical description

The issue was addressed with improved checks. This issue is fixed in Safari 17.5, iOS 16.7.8 and iPadOS 16.7.8, iOS 17.5 and iPadOS 17.5, macOS Sonoma 14.5, tvOS 17.5, watchOS 10.5. An attacker with arbitrary read and write capability may be able to bypass Pointer Authentication.

Official references

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