Apple Multiple Products Improper Authentication Vulnerability
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.
- Vendor
- Apple
- Product
- Multiple Products
- CVSS
- 5.5
- EPSS (exploit probability)
- 0.6%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2024-27834 being exploited?
Yes. CISA added CVE-2024-27834 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 0.6% (scored November 4, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-11-05. Full cross-catalog view: /kev-comparison
CVE-2024-27834 timeline
Every event links to its source. Catalog dates are each catalog's own; day offsets count from NVD publication. Data: JSON
What to do
CISA required actionApply 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.
US federal civilian agencies must remediate by (14 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Apple CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2026-86950 CoreGraphics memory confusion in Apple iOS 26, iPadOS, macOS 26, macOS 15write-up | [ HIGH ] | 8.8 | 26.2% | |
| CVE-2026-65400 Apple macOS Improper Authentication Vulnerability | [ CRITICAL ] | 9.8 | 1.7% | |
| CVE-2025-43520 Apple Multiple Products Classic Buffer Overflow Vulnerability | [ MEDIUM ] | 5.5 | 0.4% | |
| CVE-2025-43510 Apple Multiple Products Improper Locking Vulnerability | [ HIGH ] | 7.8 | 0.4% | |
| CVE-2025-31277 Apple Multiple Products Buffer Overflow Vulnerability | [ HIGH ] | 8.8 | 1.7% | |
| CVE-2023-43000 Apple Multiple products Use-After-Free Vulnerability | [ HIGH ] | 8.8 | 4.0% | |
| CVE-2023-41974 Apple iOS and iPadOS Use-After-Free Vulnerability | [ HIGH ] | 7.8 | 2.0% | |
| CVE-2021-30952 Apple Multiple Products Integer Overflow or Wraparound Vulnerability | [ HIGH ] | 7.8 | 7.0% |