Is CVE-2026-84609 being actively exploited?

CVE-2026-84609 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2026-84609?

CVE-2026-84609 has a CVSS 3.1 base score of 9.8 (CRITICAL).

CVE-2026-84609

CRITICAL · CVSS 9.8EPSS 0.7%EU EUVD

A permissions issue was addressed with improved path validation. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, tvOS 27, visionOS 27, watchOS 27. An app may be able to modify protected system files.

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: 0.7% (51th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2026-77999)
Published: September 14, 2026
NVD last modified: September 18, 2026
Status: Analyzed

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2026-77999 in the EU Vulnerability Database. Last updated in EUVD on September 16, 2026.

View on the EU Vulnerability Database

Affected products

apple / ipados
apple / iphone os
apple / macos
apple / tvos
apple / visionos
apple / watchos

Certified products that may be affected

23 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 iOS 18: iPhone - Apple Inc. - Common Criteria CCEVS-VR-VID-11623-2025 - active

See all 23 in the Security Certifications Explorer.

References

https://support.apple.com/en-us/149034(Vendor Advisory)
https://support.apple.com/en-us/149035(Vendor Advisory)
https://support.apple.com/en-us/149036(Vendor Advisory)
https://support.apple.com/en-us/149037(Vendor Advisory)
https://support.apple.com/en-us/149038(Vendor Advisory)
https://support.apple.com/en-us/149042(Vendor Advisory)
https://support.apple.com/en-us/149043(Vendor Advisory)

Last updated September 20, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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