CVE-2026-84520
CRITICAL · CVSS 9.8EPSS 0.4%EU EUVD
A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Golden Gate 27. A local attacker may be able to cause unexpected system termination or corrupt kernel memory.
Key facts
- CVSS score
- 9.8 (v3.1)
- Severity
- CRITICAL
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
- CWE-120
- EPSS score
- 0.4% (37th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2026-77997)
- Published
- September 14, 2026
- NVD last modified
- September 16, 2026
- Status
- Analyzed
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2026-77997 in the EU Vulnerability Database. Last updated in EUVD on September 16, 2026.
View on the EU Vulnerability DatabaseAffected products
- apple / macos
Certified products that may be affected
20 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Apple macOS 26 Tahoe: FileVault - Apple Inc. - Common Criteria CCEVS-VR-VID-11696-2026 - active
- Apple macOS 26 Tahoe - Apple Inc. - Common Criteria CCEVS-VR-VID-11695-2026 - active
- Apple macOS 15 Sequoia - Apple Inc. - Common Criteria CCEVS-VR-VID-11648-2026 - active
- Strong Customer Authentication for Apple Pay on MacBook Air 2024 with M3running macOS Sequoia 15.4 - Apple Inc. - Common Criteria 2025-11-INF-4674 - active
- Apple macOS 14 Sonoma - Apple Inc. - Common Criteria CCEVS-VR-VID-11584-2025 - active
See all 20 in the Security Certifications Explorer.
References
- https://support.apple.com/en-us/149035(Vendor Advisory, Release Notes)
Last updated September 18, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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