Paper/Archive/CVE-2026-86881

CVE-2026-86881

Apple iOS and iPadOS — A certificate validation issue was addressed with improved certificate validation.

CVSS 9.1 (ADP)9.1 / 10 × 3027.3 Not in CISA KEV+300.0 EPSS percentile 34.0.340 × 206.8 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

A certificate validation issue was addressed with improved certificate validation. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, tvOS 27, visionOS 27, watchOS 27. An attacker with a compromised intermediate certificate authority may be able to issue certificates with arbitrary extended key usages.

Affected

ProductAffectedFixed inSource

iOS and iPadOS< 26.726.7CNA

iOS and iPadOS< 2727CNA

macOS< 15.815.8CNA

macOS< 26.726.7CNA

macOS< 2727CNA

tvOS< 2727CNA

visionOS< 2727CNA

watchOS< 2727CNA

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refsupport.apple.com/en-us/149034 refsupport.apple.com/en-us/149035 refsupport.apple.com/en-us/149036 refsupport.apple.com/en-us/149037 refsupport.apple.com/en-us/149038 refsupport.apple.com/en-us/149041 refsupport.apple.com/en-us/149042 refsupport.apple.com/en-us/149043