CVE-2024-27834: Apple Multiple Products Improper Authentication Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on , 905 days after the CVE record was published.
VulnCheck KEV lists it since . It cites 2 public reports, the first from .
- How likely is exploitation in the next 30 days?
- 1.5%
EPSS score, percentile 74.7 of all scored records
- How severe?
- 5.5 Medium
CVSS v3.1 base score, from CISA's enrichment of the record
- What should I do?
No patch or vendor advisory is listed in the CVE record. Check Apple's advisories.
CISA (deadline ): Apply mitigations in accordance with vendor instructions … Full text
- Which versions are affected?
Affected
- before 17.5
- before 16.7.8
- before 17.5
- before 14.5
- before 17.5
- before 10.5
Source: CISA KEV 2026.11.10, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
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.
Source: CVE List, as of . About the data.
What to do
Advisories and patches
No patch, vendor advisory or mitigation is listed in the CVE record. Check Apple's own security advisories for a fix, and compare your version with the affected versions below.
Required action, set by CISA
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 due date for this action: .
Linked from CISA's catalog entry
- 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
This summary is based on the CVE record and CISA's catalog entry as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
Versions by product, as listed in the CVE record (5 products)
| Status | Versions |
|---|---|
| Affected | before 17.5 |
| Status | Versions |
|---|---|
| Affected | before 16.7.8 |
| Affected | before 17.5 |
| Status | Versions |
|---|---|
| Affected | before 14.5 |
| Status | Versions |
|---|---|
| Affected | before 17.5 |
| Status | Versions |
|---|---|
| Affected | before 10.5 |
Source: CVE List, as of . About the data.
Weakness
CWE-287
- CWE-287: Improper Authentication
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| Added to CISA KEV | |
| CVE record last updated | |
| CISA due date for the required action |
References
6
More exploited Apple vulnerabilities
- CVE-2026-86950: Apple Multiple Products Out-of-Bounds Write Vulnerability
- CVE-2026-65400: Apple macOS Improper Authentication Vulnerability
- CVE-2025-31277: Apple Multiple Products Buffer Overflow Vulnerability
- CVE-2025-43510: Apple Multiple Products Improper Locking Vulnerability
- CVE-2025-43520: Apple Multiple Products Classic Buffer Overflow Vulnerability
- CVE-2021-30952: Apple Multiple Products Integer Overflow or Wraparound Vulnerability