CVE-2026-43776 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact total

Vendors	Products
Apple	Ios And Ipados Macos

No data.

No data.

References

Link	Providers
https://support.apple.com/en-us/128066
https://support.apple.com/en-us/128067
https://support.apple.com/en-us/128071

History

Mon, 03 Aug 2026 16:15:00 +0000

Type	Values Removed	Values Added
Title	Apple OS Buffer Overflow Allowing Arbitrary Code Execution via Malicious File

Sat, 01 Aug 2026 01:15:00 +0000

Type	Values Removed	Values Added
Title		Apple OS Buffer Overflow Allowing Arbitrary Code Execution via Malicious File

Tue, 28 Jul 2026 01:00:00 +0000

Type	Values Removed	Values Added
First Time appeared		Apple Apple ios And Ipados Apple macos
Vendors & Products		Apple Apple ios And Ipados Apple macos

Mon, 27 Jul 2026 23:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-120
Metrics		cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Mon, 27 Jul 2026 20:30:00 +0000

Type	Values Removed	Values Added
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.
References		https://support.apple.com/en-us/128066 https://support.apple.com/en-us/128067 https://support.apple.com/en-us/128071

MITRE

Status: PUBLISHED

Assigner: apple

Published: 2026-07-27T20:14:34.942Z

Updated: 2026-07-28T03:57:19.188Z

Reserved: 2026-05-01T22:46:27.818Z

Link: CVE-2026-43776

Vulnrichment

Updated: 2026-07-27T21:04:14.694Z

NVD

No data.

Redhat

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43776", "assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c", "state": "PUBLISHED", "assignerShortName": "apple", "dateReserved": "2026-05-01T22:46:27.818Z", "datePublished": "2026-07-27T20:14:34.942Z", "dateUpdated": "2026-07-28T03:57:19.188Z"}, "containers": {"cna": {"problemTypes": [{"descriptions": [{"lang": "en", "description": "Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution"}]}], "affected": [{"vendor": "Apple", "product": "iOS and iPadOS", "versions": [{"version": "0", "status": "affected", "lessThan": "26.6", "versionType": "custom"}]}, {"vendor": "Apple", "product": "macOS", "versions": [{"version": "0", "status": "affected", "lessThan": "15.7.8", "versionType": "custom"}, {"version": "0", "status": "affected", "lessThan": "26.6", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "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."}], "references": [{"url": "https://support.apple.com/en-us/128066"}, {"url": "https://support.apple.com/en-us/128067"}, {"url": "https://support.apple.com/en-us/128071"}], "providerMetadata": {"orgId": "286789f9-fbc2-4510-9f9a-43facdede74c", "shortName": "apple", "dateUpdated": "2026-07-27T20:14:34.942Z"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-120", "lang": "en", "description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-07-27T00:00:00+00:00", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-43776"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-28T03:57:19.188Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-43776", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-07-27T21:04:18.639210Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-120", "description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-27T21:04:14.694Z"}}], "cna": {"affected": [{"vendor": "Apple", "product": "iOS and iPadOS", "versions": [{"status": "affected", "version": "0", "lessThan": "26.6", "versionType": "custom"}]}, {"vendor": "Apple", "product": "macOS", "versions": [{"status": "affected", "version": "0", "lessThan": "15.7.8", "versionType": "custom"}, {"status": "affected", "version": "0", "lessThan": "26.6", "versionType": "custom"}]}], "references": [{"url": "https://support.apple.com/en-us/128066"}, {"url": "https://support.apple.com/en-us/128067"}, {"url": "https://support.apple.com/en-us/128071"}], "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution"}]}], "providerMetadata": {"orgId": "286789f9-fbc2-4510-9f9a-43facdede74c", "shortName": "apple", "dateUpdated": "2026-07-27T20:14:34.942Z"}}}, "cveMetadata": {"cveId": "CVE-2026-43776", "state": "PUBLISHED", "dateUpdated": "2026-07-28T03:57:19.188Z", "dateReserved": "2026-05-01T22:46:27.818Z", "assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c", "datePublished": "2026-07-27T20:14:34.942Z", "assignerShortName": "apple"}, "dataVersion": "5.2"}