CVEs / CVE-2024-27834
CVE-2024-27834: Apple Multiple Products Improper Authentication Vulnerability
- Known exploited in the CISA KEV catalog since 4 Nov 2026
- medium 5.5 CVSS 3.1 (NVD)
- EPSS 0.59% chance of exploitation in the next 30 days, higher than 48% of CVEs (4 Nov 2026)
- Last changed at its sources
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Summary
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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Apple Safari | before 17.5 | 17.5 |
| Apple iOS and iPadOS | before 16.7.8 | 16.7.8 |
| Apple iOS and iPadOS | before 17.5 | 17.5 |
| Apple macOS | before 14.5 | 14.5 |
| Apple tvOS | before 17.5 | 17.5 |
| Apple watchOS | before 10.5 | 10.5 |
Exploitation
| In CISA KEV since | 4 Nov 2026 |
|---|---|
| Due date for US federal agencies | 18 Nov 2026 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 5.5 mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:NScored by NVD |
|---|---|
| Weakness | CWE-287 |
On the Stackurity blog
References
- CVE-2024-27834 on NVD
- CVE-2024-27834 in the CISA KEV catalog
- https://support.apple.com/en-us/120896 (cited by CISA)
- https://support.apple.com/en-us/120898 (cited by CISA)
- https://support.apple.com/en-us/120901 (cited by CISA)
- https://support.apple.com/en-us/120902 (cited by CISA)
- https://support.apple.com/en-us/120903 (cited by CISA)
- https://support.apple.com/en-us/120905 (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk (cited by CISA)
- CVE-2024-27834 on OSV
- 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
- http://seclists.org/fulldisclosure/2024/May/10 Mailing List
- http://seclists.org/fulldisclosure/2024/May/12 Mailing List
- http://seclists.org/fulldisclosure/2024/May/16 Mailing List
- http://seclists.org/fulldisclosure/2024/May/17 Mailing List
- http://seclists.org/fulldisclosure/2024/May/9 Mailing List
- http://www.openwall.com/lists/oss-security/2024/05/21/1 Mailing List
- https://lists.fedoraproject.org/archives/list/[email protected]/message/ADCLQW54XN37VJZNYD3UKCYATJFIMYXG/ Mailing List
- https://lists.fedoraproject.org/archives/list/[email protected]/message/WKIXADCW3O4R2OOSDZGPU55XQFE6NA3M/ Mailing List
- https://support.apple.com/en-us/HT214101 Vendor Advisory
- https://support.apple.com/en-us/HT214102 Vendor Advisory
- https://support.apple.com/en-us/HT214103 Vendor Advisory
- https://support.apple.com/en-us/HT214104 Vendor Advisory
- https://support.apple.com/en-us/HT214106 Vendor Advisory
- https://support.apple.com/kb/HT214100
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.