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Tvos CVE-2026-64747

| EUVDEUVD-2026-49539 HIGH
Classic Buffer Overflow (CWE-120)
2026-07-27 apple GHSA-c58x-qgq4-vvcg
7.8
CVSS 3.1 · Vendor: apple
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Vulnerability Assessment

Weakness
CWE
MITRE ATT&CK

1 technique across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 28, 2026

We are tasked with producing a JSON analysis for CVE-2026-64747. We must use all provided data, including EPSS, SSVC, patch availability, CPE, and tags. The vulnerability is a buffer overflow in Apple products, with an app potentially executing arbitrary code with kernel privileges. CVSS 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). CWE-120. Patch available from vendor. EPSS 0.19% (low). SSVC: Exploitation none, Automatable no, Technical impact total. KEV status? Not in input, so not KEV. POC? Not mentioned. Tags include RCE, Apple, Buffer Overflow, etc. Affected products: iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. CPEs confirm. References are Apple support pages.

We must produce fields:

  • product_name: 1-3 words, specific product. Since it spans many OSes, the "primary one"? The CVE description mentions iOS and iPadOS, macOS, tvOS, visionOS, watchOS. The common underlying component is likely the kernel or something. But the product is Apple's operating systems. Could say "Apple OS Family" or "Apple Kernel". The description says "An app may be able to execute arbitrary code with kernel privileges." So the vulnerability is in the kernel, accessible via an app. So product could be "Apple Kernel" or "Apple Operating Systems". But the instruction says "The specific product or service name affected. Examples: 'Apache Tomcat', 'WordPress', 'Linux Kernel'." So maybe "Apple Kernel". However, it's not explicitly named. The CPEs list specific products: ios_and_ipados, macos, tvos, visionos, watchos. So I'll use "Apple OS Family" but that is 3 words. "Apple Kernel" is 2 words. I'll go with "Apple Kernel" as the vulnerable component. The description isn't clear if it's the kernel itself or a system library, but "kernel privileges" suggests kernel execution. So "Apple Kernel" is appropriate.
  • summary: 2-3 sentences, original synthesis, avoid starting with "A vulnerability". Start with impact verb a

Affected VersionsENISA

macOS 0 <15.7.8
tvOS 0 <26.6
visionOS 0 <26.6
macOS 0 <14.8.8
watchOS 0 <26.6
macOS 0 <26.6
iOS and iPadOS 0 <26.6

Affected Packages

euvd ios_and_ipados fix: 26.6
euvd macos fix: 14.8.8, 15.7.8, 26.6
euvd tvos fix: 26.6
euvd visionos fix: 26.6
euvd watchos fix: 26.6

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 5 packages in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Severity by source

Vendor (apple) PRIMARY 7.8 HIGH
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from Vendor (apple) · only source for this CVE.

CVSS VectorVendor: apple

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Patch available
Jul 27, 2026 - 21:17 EUVD
CVE Published
Jul 27, 2026 - 20:13 cve.org
HIGH 7.8
CVE Published
Jul 27, 2026 - 20:13 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

A buffer overflow was addressed with improved size validation. This issue is fixed in 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, watchOS 26.6. An app may be able to execute arbitrary code with kernel privileges.

Threat Intelligence Overview

EPSS Score
0.2%
Top 91% exploitable
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation
None
System Exposure· derived
Small
Automatable
No
Human Impact· derived
Medium
Technical Impact
Total

Priority Score

39
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +39
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

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