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CISA Known Exploited Vulnerabilities

Apple Multiple Products Improper Authentication Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV
2026-11-04
Remediation due
2026-11-18

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.

CISA 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

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.

Severity

CVSS 3.1 · CISA5.5 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
SSVC · CISA-ADP
Exploitationactive
Automatableno
Technical impactpartial

Key Findings

as of 2026-11-06
All KEV statistics→
  • CISA added CVE-2024-27834 to the KEV catalog 905 days after its CVE record was published. The median for entries added in 2026 so far is 14 days.
  • It is one of 96 Apple entries in the CISA KEV catalog, and one of 10 added in 2026.
  • Its current EPSS score (1.4%) is higher than that of 4% of CISA KEV entries.

Affected Products

ProductAffected versions
Apple
Safari
0 to <17.5
Apple
iOS and iPadOS
0 to <16.7.8
0 to <17.5
Apple
macOS
0 to <14.5
Apple
tvOS
0 to <17.5
Apple
watchOS
0 to <10.5

More from Apple

All Apple CVEs→

CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). Alert titles and links from CISA cybersecurity alerts. This site is not affiliated with or endorsed by MITRE, NVD, CISA, or FIRST.