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.
Published: 2026-07-27
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A buffer overflow vulnerability exists in Apple iOS, iPadOS, and macOS, where insufficient bounds checking during file processing can cause an unexpected app termination or, in certain conditions, arbitrary code execution. The weakness is a classic buffer copy without checking destination size (CWE‑120).

Affected Systems

Apple iOS and iPadOS versions prior to 26.6, macOS Sequoia before 15.7.8, and macOS Tahoe before 26.6 are affected. The vulnerability is mitigated in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, and macOS Tahoe 26.6.

Risk and Exploitability

The CVSS score of 7.8 classifies the vulnerability as high severity. The EPSS score of < 1% indicates a low exploitation probability, and it is not listed in CISA’s KEV catalog, suggesting limited publicly known exploitation. The likely attack vector is the processing of a maliciously crafted file, which an attacker can supply to a vulnerable application to trigger the overflow and potentially execute arbitrary code.

Generated by OpenCVE AI on August 3, 2026 at 15:47 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update all Apple devices to iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, or macOS Tahoe 26.6 or later to apply the buffer overflow fix.
  • Ensure System Integrity Protection (SIP) is enabled on macOS to mitigate successful code execution attempts.
  • Remind users to install the latest firmware and application updates from their vendors to eliminate the vulnerability.

Generated by OpenCVE AI on August 3, 2026 at 15:47 UTC.

Tracking

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Advisories

No advisories yet.

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

Subscriptions

Apple Ios And Ipados Ipados Iphone Os Macos
cve-icon MITRE

Status: PUBLISHED

Assigner: apple

Published:

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

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

Link: CVE-2026-43776

cve-icon Vulnrichment

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

cve-icon NVD

Status : Analyzed

Published: 2026-07-27T21:17:01.977

Modified: 2026-07-28T19:44:17.417

Link: CVE-2026-43776

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T16:00:07Z

Weaknesses
  • CWE-120

    Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')