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Vulnerability record · CVE-2024-27834 · published 14 May 2024

CVE-2024-27834: Apple safari improper authentication vulnerability

Apple · Safari

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.

5.5 CVSS 3.1 Medium CISA KEV since 4 Nov 2026 EPSS 1.5% · top 25.4% CWE-287 · Improper authentication
5.5CVSS 3.1 base score
1.5%EPSS exploitation probability, 30 days
YesIn CISA KEV, federal fix due in 5 days
9Affected product versions listed by NVD
25References
5 Nov 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Exploitation in the wild

CISA added CVE-2024-27834 to the Known Exploited Vulnerabilities catalog on 4 November 2026 as "Apple Multiple Products Improper Authentication Vulnerability". 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. Federal deadline 18 November 2026.

Affected products

9 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://support.apple.com/en-us/120896 Vendor AdvisoryRelease Notes
https://support.apple.com/en-us/120898 Vendor AdvisoryRelease Notes
https://support.apple.com/en-us/120901 Vendor AdvisoryRelease Notes
https://support.apple.com/en-us/120902 Vendor AdvisoryRelease Notes
https://support.apple.com/en-us/120903 Vendor AdvisoryRelease Notes
https://support.apple.com/en-us/120905 Vendor AdvisoryRelease Notes
http://seclists.org/fulldisclosure/2024/May/10 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2024/May/12 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2024/May/16 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2024/May/17 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2024/May/9 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2024/05/21/1 Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ADCLQW54XN37VJZNYD3UKCYAT Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WKIXADCW3O4R2OOSDZGPU55XQ Mailing ListThird Party Advisory
https://support.apple.com/en-us/HT214101 Vendor AdvisoryRelease Notes
https://support.apple.com/en-us/HT214102 Vendor AdvisoryRelease Notes
https://support.apple.com/en-us/HT214103 Vendor AdvisoryRelease Notes
https://support.apple.com/en-us/HT214104 Vendor AdvisoryRelease Notes
https://support.apple.com/en-us/HT214106 Vendor AdvisoryRelease Notes
https://support.apple.com/kb/HT214100 Vendor AdvisoryRelease Notes
https://support.apple.com/kb/HT214102 Vendor AdvisoryRelease Notes
https://support.apple.com/kb/HT214104 Vendor AdvisoryRelease Notes
https://support.apple.com/kb/HT214106 Vendor AdvisoryRelease Notes
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-27834 US Government Resource
https://www.sekoia.com/blog/poisoned-source-apt29-watering-holes-targets-mobile-devices-with-n-day-exploits Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2024-27834), CISA KEV, FIRST EPSS (scores of 2026-11-11). This page is refreshed as NVD updates the record.