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CVE-2024-27834

5.5, medium Known exploited

Apple Multiple Products Improper Authentication Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
5.5, medium medium CVSS v3.1
EPSS, next 30 days
0.6% higher than 48.7% of scored CVEs
Exploitation
Confirmed in the wild
Published
14 May 20242 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 4 Nov 2026. US federal agencies must remediate by 18 Nov 2026.

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.

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.

Details

Vendor
Apple
Product
Safari
Weakness
CWE-287 (opens in a new tab)
Status
Modified
Updated
4 Nov 2026
Assigner
product-security@apple.com

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

References 25

Exploit code 5

Advisories 6

Other references 14

6 more

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Apple CVEs

Every Apple CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-86950 Apple Multiple Products Out-of-Bounds Write Vulnerability KEV EPSS 26% 8.8, high
  • CVE-2026-65400 Apple macOS Improper Authentication Vulnerability KEV EPSS 2% 9.8, critical
  • CVE-2026-20700 Apple Multiple Buffer Overflow Vulnerability KEV EPSS 2% 7.8, high
  • CVE-2025-43529 Apple Multiple Products Use-After-Free WebKit Vulnerability KEV EPSS 26% 8.8, high
  • CVE-2025-43510 Apple Multiple Products Improper Locking Vulnerability KEV EPSS 0.4% 7.8, high
  • CVE-2025-43520 Apple Multiple Products Classic Buffer Overflow Vulnerability KEV EPSS 0.4% 5.5, medium
  • CVE-2023-43000 Apple Multiple products Use-After-Free Vulnerability KEV EPSS 4% 8.8, high
  • CVE-2025-43300 Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability KEV EPSS 65% 10, critical

Beyond this page

Is CVE-2024-27834 in your network?

This page tells you how dangerous CVE-2024-27834 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2024-27834 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2024-27834 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 5 Nov 2026, not the live upstream state.