Buffer overflow in macOS - CVE-2026-20700
Published: February 11, 2026
Vulnerability identifier: #VU122706
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20700
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in dyld. A local user can trigger memory corruption and execute arbitrary code on the target system.
Note, the vulnerability is being actively exploited in the wild in conjunction with vulnerabilities #VU119833 (CVE-2025-14174) and #VU119902 (CVE-2025-43529).
Affected software
macOS
visionOS
watchOS
tvOS
iPadOS
Apple iOS
visionOS
watchOS
tvOS
iPadOS
Apple iOS
How to mitigate CVE-2026-20700
Install updates from vendor's website.
macOS - update to 26.3 25D125
visionOS - update to 26.3
watchOS - update to 26.3 23S620
tvOS - update to 26.3 23K620
iPadOS - update to 26.3 23D127
Apple iOS - update to 26.3 23D127
visionOS - update to 26.3
watchOS - update to 26.3 23S620
tvOS - update to 26.3 23K620
iPadOS - update to 26.3 23D127
Apple iOS - update to 26.3 23D127