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PatchSiren cyber security CVE debrief

CVE-2025-43278 Apple CVE debrief

CVE-2025-43278 is a medium-severity vulnerability (CVSS Score: 5.5) that was addressed with improved handling of symlinks. The issue is fixed in macOS Sequoia 15.4. According to the CVE description, an app may be able to access protected user data. The CVE was published on [cvePublishedAt] and modified on [cveModifiedAt].

Vendor
Apple
Product
macOS
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-11
Original CVE updated
2026-06-15
Advisory published
2026-06-11
Advisory updated
2026-06-15

Who should care

Users of macOS Sequoia 15.4 and administrators of affected systems should prioritize patching this vulnerability to prevent potential unauthorized access to protected user data.

Technical summary

The vulnerability (CVE-2025-43278) was addressed with improved handling of symlinks. This issue is fixed in macOS Sequoia 15.4. An app may be able to access protected user data.

Defensive priority

MEDIUM

Recommended defensive actions

  • Apply the patch: Update to macOS Sequoia 15.4 or later.
  • See [ref-4](https://support.apple.com/en-us/122373) for more information.

Evidence notes

The vendor is likely Apple, as indicated by the evidence in the CVE record and the reference to the Apple support page [ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2025-43278 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-43278

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-43278 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-43278

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.