What’s Vulnerable › Vulnerabilities

CVE-2026-86870

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-14 · updated 2026-10-26
• Weakness: CWE-122

Description

A heap buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, visionOS 27, watchOS 27. Processing a maliciously crafted file may lead to unexpected app termination.

Affected products

• Apple iPadOS: before 26.7 — fixed in 26.7
• Apple Iphone Os: before 26.7 — fixed in 26.7
• Apple macOS: before 27.0 — fixed in 27.0
• Apple visionOS: before 27.0 — fixed in 27.0
• Apple watchOS: before 27.0 — fixed in 27.0
• Apple iOS and iPadOS: before 26.7; before 27 — fixed in 26.7, 27
• Apple macOS: before 27 — fixed in 27
• Apple visionOS: before 27 — fixed in 27
• Apple watchOS: before 27 — fixed in 27

How to fix

Upgrade to a fixed version: Apple iPadOS 26.7; Apple Iphone Os 26.7; Apple macOS 27.0; Apple visionOS 27.0; Apple watchOS 27.0; Apple iOS and iPadOS 26.7, 27; Apple macOS 27; Apple visionOS 27; Apple watchOS 27. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/149034
• https://support.apple.com/en-us/149035
• https://support.apple.com/en-us/149037
• https://support.apple.com/en-us/149038
• https://support.apple.com/en-us/149041

Get alerted when CVE-2026-86870 or the next vulnerability affects your stack