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Apple iOS EUVDEUVD-2026-88445

| CVE-2026-86950 HIGH
Out-of-bounds Write (CWE-787)
2026-09-28 apple GHSA-3cf3-h799-fjvq
8.8
CVSS 3.1 · Vendor: apple
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Severity by source

Vendor (apple) PRIMARY
8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vuln.today AI
8.8 HIGH

Malicious file can be delivered remotely (AV:N) with no auth (PR:N) but needs the user to process it (UI:R); an OOB write yielding code execution gives full C/I/A impact.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (apple).

CVSS VectorVendor: apple

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

Lifecycle Timeline

9
POC Analysis Generated
Sep 30, 2026 - 15:22 vuln.today
Threat Model Generated
Sep 29, 2026 - 15:30 vuln.today
Added to CISA KEV
Sep 29, 2026 - 14:32 CISA
Metadata Corrected
Sep 28, 2026 - 22:40 vuln.today
tag: macOS added
Analysis Generated
Sep 28, 2026 - 21:51 vuln.today
CVSS changed
Sep 28, 2026 - 20:22 NVD
8.8 (HIGH)
Patch available
Sep 28, 2026 - 20:02 EUVD
CVE Published
Sep 28, 2026 - 19:13 cve.org
HIGH 8.8
CVE Published
Sep 28, 2026 - 19:13 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7.1 and iPadOS 26.7.1, macOS Sequoia 15.8.1, macOS Tahoe 26.7.1. Processing a maliciously crafted file may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 27.

AnalysisAI

Out-of-bounds write in Apple's iOS, iPadOS, and macOS file-parsing code lets remote attackers achieve arbitrary code execution when a victim opens a maliciously crafted file, scoring CVSS 8.8 (AV:N/AC:L/PR:N/UI:R, CWE-787). Apple fixed the flaw in iOS 26.7.1, iPadOS 26.7.1, macOS Sequoia 15.8.1, and macOS Tahoe 26.7.1, and states it is aware of a report that the issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 27. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Impact
technique details hidden

Vulnerability AssessmentAI

Exploitation Requires the victim to process/open a maliciously crafted file on a vulnerable device (UI:R), so exploitation depends on user interaction and successful delivery of the malicious file to the target. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a genuine top-priority vulnerability despite conflicting signals. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply the vendor-released patches: iOS 26.7.1 and iPadOS 26.7.1 for iPhone and iPad, macOS Sequoia 15.8.1, and macOS Tahoe 26.7.1 for Macs, as documented in Apple advisories https://support.apple.com/en-us/149226, https://support.apple.com/en-us/149228, and https://support.apple.com/en-us/149229. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory all Apple endpoints and confirm version levels, then prioritize patching for executives, privileged administrators, finance, legal, and any personnel with elevated data access or public visibility, since open-source reporting indicates targeting of specific individuals; distribute an interim advisory instructing staff to avoid opening unexpected or unsolicited file attachments from unknown senders until devices are updated. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-88445 vulnerability details – vuln.today

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