CVE-2026-64770: Apple macOS buffer overflow (CVSS 9.8)

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6. A remote attacker may be able to cause unexpected application termination or heap corruption.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Apple iPadOS< 26.6

Apple iPhone OS< 26.6

Apple macOS≥ 14.0 < 14.8.8 · ≥ 15.0 < 15.7.8 · ≥ 26.0 < 26.6

Apple Tvos< 26.6

Apple Visionos< 26.6

Remediation

Fixed in

Apple iPadOS≥ 26.6

Apple iPhone OS≥ 26.6

Apple macOS≥ 14.8.8

Apple Tvos≥ 26.6

Apple Visionos≥ 26.6

Patch & vendor advisories

References

https://support.apple.com/en-us/128066Release NotesVendor Advisory
https://support.apple.com/en-us/128067Release NotesVendor Advisory
https://support.apple.com/en-us/128069Release NotesVendor Advisory
https://support.apple.com/en-us/128070Release NotesVendor Advisory
https://support.apple.com/en-us/128071Release NotesVendor Advisory
https://support.apple.com/en-us/128072Release NotesVendor Advisory
https://support.apple.com/en-us/148287

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2026-64770 being actively exploited?

CVE-2026-64770 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.80%.

How severe is CVE-2026-64770?

CVE-2026-64770 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.80% probability of exploitation.

Which products are affected by CVE-2026-64770?

Affected products include Apple iPadOS, Apple iPhone OS, Apple macOS, Apple Tvos, Apple Visionos.

How do I fix CVE-2026-64770?

Upgrade affected software to a fixed version, for example Apple iPadOS 26.6, Apple iPhone OS 26.6, Apple macOS 14.8.8 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-64770 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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