VulnTideExploited vulnerabilities, by vendor. Data as of 28 Oct 2026.
Known exploitedIn CISA's KEV catalog since 20 March 2026Ransomware use: unknown
Apple Multiple Products

CVE-2025-43520: Apple Multiple Products Classic Buffer Overflow Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 20 Mar 2026, 98 days after the CVE record was published.

How likely is exploitation in the next 30 days?
0.4%

EPSS score, percentile 36.7 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?

CISA deadline 3 Apr 2026. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

  • before 18.7.2
  • before 26.1
  • before 14.8.2
  • before 15.7.2
  • before 26.1
  • before 26.1

and 2 more in the table below

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

Required action, set by CISA

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CISA due date for this action: 3 April 2026.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

Affected products and versions

As listed in the CVE record.

Apple iOS and iPadOS
StatusVersions
Affectedbefore 18.7.2
Affectedbefore 26.1
Apple macOS
StatusVersions
Affectedbefore 14.8.2
Affectedbefore 15.7.2
Affectedbefore 26.1
Apple tvOS
StatusVersions
Affectedbefore 26.1
Apple visionOS
StatusVersions
Affectedbefore 26.1
Apple watchOS
StatusVersions
Affectedbefore 26.1

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

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.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

  • CISA added CVE-2025-43520 to its Known Exploited Vulnerabilities (KEV) catalog on 20 Mar 2026.
  • CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
  • The due date CISA sets for the required action is 3 Apr 2026.
  • The CVE record was published on 12 Dec 2025, 98 days before it was added to KEV.
  • The CVE record carries a CVSS v3.1 base score of 5.5 (Medium), taken from CISA's enrichment of the record.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.4% (percentile 36.7), as of 28 Oct 2026.
  • CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. A malicious application may be able to cause unexpected system termination or write kernel memory.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

  • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

DateEvent
12 Dec 2025CVE record published
20 Mar 2026Added to CISA KEV
3 Apr 2026CISA due date for the required action
21 Sep 2026CVE record last updated

References

More exploited Apple vulnerabilities

  • CVE-2026-86950: Apple Multiple Products Out-of-Bounds Write Vulnerability (added 29 Sep 2026)
  • CVE-2026-65400: Apple macOS Improper Authentication Vulnerability (added 18 Aug 2026)
  • CVE-2025-31277: Apple Multiple Products Buffer Overflow Vulnerability (added 20 Mar 2026)
  • CVE-2025-43510: Apple Multiple Products Improper Locking Vulnerability (added 20 Mar 2026)
  • CVE-2021-30952: Apple Multiple Products Integer Overflow or Wraparound Vulnerability (added 5 Mar 2026)
  • CVE-2023-41974: Apple iOS and iPadOS Use-After-Free Vulnerability (added 5 Mar 2026)