Exploited vulnerability · CISA KEV

Is CVE-2025-43520 exploited? Yes: in CISA KEV since 20 Mar 2026

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

Yes. CVE-2025-43520, Apple Multiple Products Classic Buffer Overflow Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 20 Mar 2026, 98 days after it was published. It affects Apple Multiple Products. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

What it is

Apple watchOS, iOS, iPadOS, macOS, visionOS, and tvOS contain a classic buffer overflow vulnerability which could allow a malicious application to cause unexpected system termination or write kernel memory.

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 per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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 12 Dec 2025.
4. Get told next time. Email alerts when CISA adds a CVE for Apple.

Other exploited CVEs in Multiple Products

• CVE-2024-27834: Apple Multiple Products Improper Authentication Vulnerability (4 Nov 2026)
• 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-2025-31277: 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/125632
• support.apple.com/en-us/125633
• support.apple.com/en-us/125634
• support.apple.com/en-us/125635
• support.apple.com/en-us/125636
• support.apple.com/en-us/125637
• support.apple.com/en-us/125638
• support.apple.com/en-us/125639

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 March 2026 · Apple scorecard · act-now radar.