CVE-2026-64771: tvos Buffer Overflow — Fix

Description

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6. A remote attacker may be able to cause unexpected application termination or heap corruption.

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CVSS v3.1 Score

9.8

CRITICAL

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

EPSS — Exploit Prediction

0.0070

Probability of exploitation

0.50%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-119 Buffer Overflow

Affected Products

Vendor	Product	Versions
apple	ipados	< 26.6
apple	iphone_os	< 26.6
apple	macos	15.0 — 15.7.8
apple	macos	26.0 — 26.6
apple	tvos	< 26.6
apple	visionos	< 26.6

References

Advisories & Patches

https://support.apple.com/en-us/128066 https://support.apple.com/en-us/128067 https://support.apple.com/en-us/128069 https://support.apple.com/en-us/128070 https://support.apple.com/en-us/128071

Frequently Asked Questions

What is CVE-2026-64771? +

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6. A remote attacker may be able to cause unexpected application termination or heap corruption. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-64771? +

CVE-2026-64771 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0070, placing it in the 1th percentile for exploitation probability.

What products are affected by CVE-2026-64771? +

CVE-2026-64771 affects products from apple, specifically: ipados, iphone_os, macos, tvos, visionos. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-64771? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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