What’s Vulnerable › Vulnerabilities

CVE-2026-28858

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-25 · updated 2026-06-17
• Weakness: CWE-120

Description

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.4 and iPadOS 26.4. A remote user may be able to cause unexpected system termination or corrupt kernel memory.

Affected products

• Apple iPadOS: before 26.4 — fixed in 26.4
• Apple Iphone Os: before 26.4 — fixed in 26.4

How to fix

Upgrade to a fixed version: Apple iPadOS 26.4; Apple Iphone Os 26.4. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/126792

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