CVE-2026-28931

⚠️ high

Summary

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, watchOS 26.6. Connecting to a malicious NFS server may lead to kernel memory corruption.

CVSS Score

8.8

High

EPSS Score

0.3

Exploit Probability

Published Date

2026-07-27

First Seen: 2026-07-31

📊 Relative Risk Intelligence

This CVE is High Risk - more severe than 81.0% of all 340,405 vulnerabilities in our database.

#64,719

Top 25% most severe

Severity Percentile

🎯 CISA SSVC Assessment Updated: Jul 28, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Total

Complete system compromise possible

SSVC data provided by CISA

Last Modified 2026-07-29

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-120

📦 Affected Products 5

Vendor	Product	Status	Affected Versions
apple	iphone_os	Affected	< 26.6
apple	watchos	Affected	< 26.6
apple	tvos	Affected	< 26.6
apple	ipados	Affected	< 26.6
apple	macos	Affected	> 26.0 < 26.6

🔗 References 4

https://support.apple.com/en-us/128066

Release Notes Vendor Advisory

https://support.apple.com/en-us/128067

Release Notes Vendor Advisory

https://support.apple.com/en-us/128068

Release Notes Vendor Advisory

https://support.apple.com/en-us/128069

Release Notes Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-28928	⛔ critical	9.8	0.4	A use after free issue was addressed with improved memory management. This issue is fixed in iOS 26.6 and iPadOS 26.6, m...	2026-07-27
CVE-2026-28973	⚠️ high	8.6	0.1	An integer overflow was addressed with improved input validation. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS...	2026-07-27
CVE-2026-43673	⚠️ high	7.8	0.1	The issue was addressed with improved memory handling. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15...	2026-07-27
CVE-2026-43711	⚠️ high	7.8	0.1	A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 26.6 and iPadOS 26.6, ...	2026-07-27
CVE-2026-43714	🔶 medium	5.5	0.1	The issue was addressed with improved input sanitization. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia...	2026-07-27
CVE-2026-43723	⚠️ high	7.8	0.2	A path handling issue was addressed with improved validation. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Seq...	2026-07-27

These CVEs affect the same products