CVE-2026-43776 | A buffer overflow was addressed with improved bounds checkin… | CVSS 7.8 HIGH

Description

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6. Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution.

Metadata

CVE ID: CVE-2026-43776
State: PUBLISHED
Assigner: apple
Reserved: 2026-05-01 22:46 UTC
Published: 2026-07-27 20:14 UTC
Last updated: 2026-07-28 03:57 UTC
Primary CWE: CWE-120
CWE-120 Buffer Copy without Checking Size of Input ('Classic…
Vendor / Product: Apple / iOS and iPadOS
Sources: cve.org · NVD

Severity & Metrics

7.8 HIGH CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (2)

Vendor	Product	Platform	Versions
Apple	iOS and iPadOS	—	0 < 26.6
Apple	macOS	—	0 < 15.7.8, 0 < 26.6

Weakness (CWE)

CWE	Source	Description
—	cna	Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution
CWE-120	adp	CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.8	HIGH	3.1	adp	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References (3)