EUVD-2026-78122
GHSA-wx7g-gmcw-pmcw
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Memory lifecycle management
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. |
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Alert meAnalysisAIv1 – Sep 16, 2026
Kernel-level use-after-free in Apple's built-in NFS client allows memory corruption when a device connects to an attacker-operated NFS server, affecting iOS/iPadOS, macOS, tvOS, visionOS and watchOS. Exploitation requires the victim to mount or connect to a malicious NFS share (UI:R) but no credentials or privileges on the target device, making this a remote, unauthenticated-against-the-client attack that terminates in kernel memory corruption with high confidentiality, integrity and availability impact. No public exploit code and no CISA KEV listing were identified at time of analysis; EPSS is low at 0.18% (8th percentile), and CISA SSVC rates exploitation as none and automatable as no, though technical impact is total. Apple has released fixes in iOS 26.7/27, iPadOS 26.7/27, macOS Sequoia 15.8, macOS Tahoe 26.7, macOS Golden Gate 27, tvOS 27, visionOS 27 and watchOS 27.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 5 packages in euvd
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Severity by source
AV:N/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
Lifecycle Timeline
4DescriptionCVE.org
A use-after-free issue was addressed with improved memory management. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, tvOS 27, visionOS 27, watchOS 27. Connecting to a malicious NFS server may lead to kernel memory corruption.
Executive ViewAI
Apple's built-in NFS client across iOS, iPadOS, macOS, tvOS, visionOS and watchOS contains a kernel memory-corruption flaw that can be triggered when a user connects to an attacker-controlled NFS share, potentially giving the attacker deep access to the device with full loss of confidentiality, integrity and availability. The risk is concentrated in managed fleets where users regularly mount network shares - engineering, media and hybrid-work populations in particular - since a single user-initiated connection is enough to expose an otherwise fully patched device. There is no evidence of exploitation or public exploit code today, so this is a proactive patch-management event rather than an active incident.
Within 24 hours, confirm which managed assets have the NFS client enabled or users who routinely mount external shares, and validate that you can inventory OS versions across iOS/iPadOS, macOS, tvOS, visionOS and watchOS; if a formal change process allows, begin emergency patching of the highest-exposure macOS endpoints. Within 7 days, deploy the vendor fixes broadly: iOS 26.7/27, iPadOS 26.7/27, macOS Sequoia 15.8, macOS Tahoe 26.7, macOS Golden Gate 27, tvOS 27, visionOS 27 and watchOS 27, prioritizing devices used for engineering, media or other share-mounting workflows, and verify compliance through your MDM/EDR reporting. Within 30 days, complete remediation of remaining unpatched devices, restrict or remove unnecessary NFS share mounting through policy, and revalidate that no endpoints fall outside automated update enforcement.
Apply vendor patch.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
VulDB
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.
What every action level means
SSVC AssessmentENISA
Priority Score
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.
Use-after-free vulnerabilities occur when a program continues to access memory through a pointer after that memory has been deallocated.
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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Exploit-DB