CVE-2024-27834
Medium5.5CISA KEV — exploited in the wildApple Multiple Products Improper Authentication Vulnerabilityname from CISA KEV
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
- 5.5v3.1
- EPSS (exploit probability)
- 0.6%49th pct
- CISA KEV
- Listed
EPSS trendFIRST daily scores, last 90 days
Daily values
| Score date | EPSS | Percentile |
|---|---|---|
| 2026-11-04 | 0.6% | 48.8% |
| 2026-11-03 | 0.6% | 48.7% |
| 2026-11-02 | 0.6% | 48.6% |
| 2026-11-01 | 0.6% | 48.6% |
| 2026-10-31 | 0.6% | 48.6% |
| 2026-10-30 | 0.6% | 48.6% |
| 2026-10-29 | 0.6% | 48.5% |
| 2026-10-28 | 0.6% | 48.5% |
| 2026-10-27 | 0.6% | 48.4% |
| 2026-10-26 | 0.6% | 48.3% |
| 2026-10-25 | 0.6% | 48.3% |
| 2026-10-24 | 0.6% | 48.0% |
| 2026-10-23 | 0.6% | 48.0% |
| 2026-10-22 | 0.6% | 47.9% |
| 2026-10-21 | 0.6% | 47.9% |
| 2026-10-20 | 0.6% | 47.7% |
| 2026-10-19 | 0.6% | 47.6% |
| 2026-10-18 | 0.6% | 47.5% |
| 2026-10-17 | 0.6% | 47.5% |
| 2026-10-16 | 0.6% | 47.5% |
| 2026-10-15 | 0.6% | 47.5% |
| 2026-10-14 | 0.6% | 47.4% |
| 2026-10-13 | 0.6% | 47.2% |
| 2026-10-12 | 0.6% | 47.1% |
| 2026-10-11 | 0.6% | 47.1% |
| 2026-10-10 | 0.6% | 47.1% |
| 2026-10-09 | 0.6% | 47.0% |
| 2026-10-08 | 0.6% | 47.0% |
| 2026-10-07 | 0.6% | 46.9% |
| 2026-10-06 | 0.6% | 46.9% |
| 2026-10-05 | 0.6% | 46.8% |
CISA KEV entrycatalogue 2026.11.04
- Date added
- 2026-11-04
- Federal due date
- 2026-11-18
- Known ransomware use
- 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.
Verbatim from the CISA KEV catalogue (CISA KEV, fetched 2026-11-05 07:20 UTC). The due date applies to US federal agencies under BOD 22-01.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Affected products
- apple safari
- apple ipados
- apple iphone os
- apple macos
- apple tvos
- apple watchos
- webkitgtk webkitgtk
- wpewebkit wpe webkit
- fedoraproject fedora
Coverage1 article
References
- 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
- http://seclists.org/fulldisclosure/2024/May/12
- http://seclists.org/fulldisclosure/2024/May/16
- http://seclists.org/fulldisclosure/2024/May/17
- http://seclists.org/fulldisclosure/2024/May/9
- http://www.openwall.com/lists/oss-security/2024/05/21/1
- https://lists.fedoraproject.org/archives/list/[email protected]/message/ADCLQW54XN37VJZNYD3UKCYATJFIMYXG/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/WKIXADCW3O4R2OOSDZGPU55XQFE6NA3M/
- https://support.apple.com/en-us/HT214101
- https://support.apple.com/en-us/HT214102
- https://support.apple.com/en-us/HT214103
- https://support.apple.com/en-us/HT214104
- https://support.apple.com/en-us/HT214106
- https://support.apple.com/kb/HT214100
- https://support.apple.com/kb/HT214102
- https://support.apple.com/kb/HT214104
- https://support.apple.com/kb/HT214106
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-27834
- https://www.sekoia.com/blog/poisoned-source-apt29-watering-holes-targets-mobile-devices-with-n-day-exploits