High severity · published Jul 27, 2026
CVE-2026-43776
A buffer overflow was addressed with improved bounds checking
7.8
CVSS
0.2%
EPSS
No
On KEV
Description
A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, 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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
macOS · Apple
before 15.7.8; before 26.6 · source: vendor, NVD
IO
iOS · Apple
before 26.6 · source: NVD
IA
iOS and iPadOS · Apple
before 18.7.10; before 26.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-43776
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-43776
Release Notes
https://support.apple.com/en-us/128066
Release Notes
https://support.apple.com/en-us/128067
Release Notes
https://support.apple.com/en-us/128071
support.apple.com
https://support.apple.com/en-us/148287
More from macOS
10.0
CVE-2025-43300
Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability
10.0
CVE-2025-24201
Apple Multiple Products WebKit Out-of-Bounds Write Vulnerability
10.0
CVE-2025-24085
Apple Multiple Products Use-After-Free Vulnerability
9.8
CVE-2026-65400
Apple macOS Improper Authentication Vulnerability
9.8
CVE-2025-31200
Apple Multiple Products Memory Corruption Vulnerability