Cyber Posture

CVE-2026-43661

High

Published: 11 May 2026

Published
11 May 2026
Modified
12 May 2026
KEV Added
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Patch
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CVSS Score 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0002 4.7th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-43661 is a high-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Apple Ipados. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked at the 4.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploitation for Client Execution (T1203).
Threat & Defense Details

MITRE ATT&CK Enterprise TechniquesAI

T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
Why these techniques?

Buffer overflow in client-side image processing directly enables exploitation for code execution in applications handling untrusted images.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, watchOS 26.5. Processing a maliciously crafted image may corrupt process memory.

Deeper analysisAI

Automated synthesis unavailable for this CVE.

Details

CWE(s)
CWE-121

Affected Products

apple
ipados
≤ 26.5
apple
iphone os
≤ 26.5
apple
macos
26.0 — 26.5
apple
tvos
≤ 26.5
apple
watchos
≤ 26.5

References