A buffer overflow was addressed with improved bounds checking. (CVE-2026-43776)
CVE-2026-43776 is a high-severity buffer overflow vulnerability that was addressed by improved bounds checking. It affects Apple operating systems including iOS, iPadOS, and macOS. Processing a specially crafted file may cause unexpected application termination or allow arbitrary code execution. The issue is fixed in iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, and macOS Tahoe 26.6.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-43776) is a buffer overflow caused by insufficient bounds checking in certain Apple operating systems. Exploitation requires processing a maliciously crafted file, which can lead to unexpected app termination or arbitrary code execution. The flaw is addressed by improved bounds checking and fixed in specific versions of iOS, iPadOS, and macOS as stated by the vendor. The CVSS 3.1 score is 7.8, indicating high severity with high impact on confidentiality, integrity, and availability. No known exploits in the wild have been reported.
Potential Impact
Successful exploitation can result in arbitrary code execution with user-level privileges, potentially allowing an attacker to execute malicious code. It also can cause application crashes leading to denial of service. The vulnerability impacts confidentiality, integrity, and availability of affected systems.
Mitigation Recommendations
The vulnerability is fixed in iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, and macOS Tahoe 26.6. Users and administrators should apply these official updates to remediate the issue. No additional mitigations are indicated by the vendor advisory.
A buffer overflow was addressed with improved bounds checking. (CVE-2026-43776)
Description
CVE-2026-43776 is a high-severity buffer overflow vulnerability that was addressed by improved bounds checking. It affects Apple operating systems including iOS, iPadOS, and macOS. Processing a specially crafted file may cause unexpected application termination or allow arbitrary code execution. The issue is fixed in iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, and macOS Tahoe 26.6.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-43776) is a buffer overflow caused by insufficient bounds checking in certain Apple operating systems. Exploitation requires processing a maliciously crafted file, which can lead to unexpected app termination or arbitrary code execution. The flaw is addressed by improved bounds checking and fixed in specific versions of iOS, iPadOS, and macOS as stated by the vendor. The CVSS 3.1 score is 7.8, indicating high severity with high impact on confidentiality, integrity, and availability. No known exploits in the wild have been reported.
Potential Impact
Successful exploitation can result in arbitrary code execution with user-level privileges, potentially allowing an attacker to execute malicious code. It also can cause application crashes leading to denial of service. The vulnerability impacts confidentiality, integrity, and availability of affected systems.
Mitigation Recommendations
The vulnerability is fixed in iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, and macOS Tahoe 26.6. Users and administrators should apply these official updates to remediate the issue. No additional mitigations are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-77wc-7xcr-f383
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-43776"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a83aa7abf8831d539e32735
Added to database: 08/18/2026, 00:42:34 UTC
Last enriched: 08/18/2026, 00:58:20 UTC
Last updated: 08/18/2026, 01:52:50 UTC
Views: 3
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