Exploited vulnerability · CISA KEV

Is CVE-2024-27834 exploited? Yes: in CISA KEV since 4 Nov 2026

Gociux · Apple Multiple Products · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2024-27834, Apple Multiple Products Improper Authentication Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 4 Nov 2026, 905 days after it was published. It affects Apple Multiple Products. If you run it, CISA's required action is: 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.

What it is

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.

What to do

1. Check whether you run it. Look for Multiple Products in your asset inventory, including appliances and cloud images. Stack check lists every exploited Apple CVE at once.
2. Apply the fix. 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.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 13 May 2024.
4. Get told next time. Email alerts when CISA adds a CVE for Apple.

Other exploited CVEs in Multiple Products

• CVE-2026-86950: Apple Multiple Products Out-of-Bounds Write Vulnerability (29 Sep 2026)
• CVE-2025-43510: Apple Multiple Products Improper Locking Vulnerability (20 Mar 2026)
• CVE-2025-43520: Apple Multiple Products Classic Buffer Overflow Vulnerability (20 Mar 2026)
• CVE-2025-31277: Apple Multiple Products Buffer Overflow Vulnerability (20 Mar 2026)
• CVE-2023-43000: Apple Multiple products Use-After-Free Vulnerability (5 Mar 2026)
• CVE-2021-30952: Apple Multiple Products Integer Overflow or Wraparound Vulnerability (5 Mar 2026)

References

• support.apple.com/en-us/120896
• support.apple.com/en-us/120898
• support.apple.com/en-us/120901
• support.apple.com/en-us/120902
• support.apple.com/en-us/120903
• support.apple.com/en-us/120905
• nvd.nist.gov/vuln/detail/CVE-2024-27834

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in November 2026 · Apple scorecard · act-now radar.