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Tvos CVE-2026-64754

| EUVDEUVD-2026-49465 MEDIUM
Out-of-bounds Write (CWE-787)
2026-07-27 apple GHSA-gqrj-rfc8-mvqp
5.5
CVSS 3.1 · Vendor: apple
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Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, write limits
MITRE ATT&CK

2 techniques across 2 tactics: Execution, Privilege Escalation

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

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 28, 2026

We are tasked with synthesizing data from multiple intelligence sources about CVE-2026-64754 into a comprehensive analysis, returning a JSON object with specific fields. All fields must be plain text strings (paragraphs). We must use all provided data and cross-reference to add value. The output must be grounded in the input data, not invented.

Let's extract and analyze the provided data:

  • CVE ID: CVE-2026-64754
  • Description: "An out-of-bounds write issue was addressed with improved bounds checking. 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. Processing a maliciously crafted file may lead to a denial-of-service."
  • CVSS Score: 5.5, Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
  • CWE: CWE-787 (Out-of-bounds Write)
  • EPSS: 0.16% (percentile 5%) — low exploitation probability.
  • Patch: Available from vendor (Yes). The fix is listed in the versions above.
  • Reported by: apple
  • CPE: apple:ios_and_ipados, apple:macos, apple:tvos, apple:visionos, apple:watchos — all with *:*:*:*:*:*:*. Specific version ranges given by EUVD: macOS 0 <15.7.8, macOS 0 <14.8.8, iOS and iPadOS 0 <26.6, macOS 0 <26.6, watchOS 0 <26.6, tvOS 0 <26.6, visionOS 0 <26.6. Note the macOS versions include Sequoia 15.7.8 fix, Sonoma 14.8.8, Tahoe 26.6. "macOS 0 <26.6" likely means macOS Tahoe (version 26.x). So affected products: all Apple operating systems before these fixed versions.
  • Tags: Apple, Buffer Overflow, Ios And Ipados, Tvos, Visionos, Watchos, Memory Corruption. Also "Memory Corruption" tag is relevant.
  • References: All are Apple support pages: 128066, 128067, 128068, 128069, 128070, 128071, 128072. Also ENISA EUVD ID: EUVD-2026-49465, with link to NVD.

Now, we need to produce each field as a paragraph.

  1. product_name: "1-3 words ONLY. The specific product or service name affected. Examples: 'Apache Tomcat', 'WordPress', 'Linux Kernel', 'nginx-ui', 'GoAnywhere MFT'. NOT

Affected VersionsENISA

macOS 0 <15.7.8
macOS 0 <14.8.8
iOS and iPadOS 0 <26.6
macOS 0 <26.6
watchOS 0 <26.6
tvOS 0 <26.6
visionOS 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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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (apple) PRIMARY 5.5 MEDIUM
AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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
None
Integrity
None
Availability
High

Lifecycle Timeline

4
CVSS changed
Jul 28, 2026 - 19:22 NVD
5.5 (MEDIUM)
Patch available
Jul 27, 2026 - 21:17 EUVD
CVE Published
Jul 27, 2026 - 20:12 cve.org
UNKNOWN (no severity yet)
CVE Published
Jul 27, 2026 - 20:12 cve.org
MEDIUM 5.5

DescriptionCVE.org

An out-of-bounds write issue was addressed with improved bounds checking. 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. Processing a maliciously crafted file may lead to a denial-of-service.

Threat Intelligence Overview

EPSS Score
0.2%
Top 95% 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 MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
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
Partial

Priority Score

28
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +28
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.

Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.

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