Medium severity · published Mar 25, 2026
CVE-2026-20690
An out-of-bounds access issue was addressed with improved bounds checking
6.5
CVSS
0.8%
EPSS
No
On KEV
Description
An out-of-bounds access issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. Processing an audio stream in a maliciously crafted media file may terminate the process.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
macOS · Apple
before 14.8.5; before 15.7.5; before 26.4 · source: vendor, NVD
IO
iOS · Apple
before 18.7.7; 26.0 before 26.4 · source: NVD
IA
iOS and iPadOS · Apple
before 18.7.7; before 26.4 · source: vendor
TV
tvOS · Apple
before 26.4 · source: vendor, NVD
VI
visionOS · Apple
before 26.4 · source: vendor, NVD
WA
watchOS · Apple
before 26.4 · source: vendor, NVD
In the news
VulnerabilityHigh
ZDI-26-230: Apple macOS CoreMedia Framework Out-Of-Bounds Write Remote Code Execution Vulnerability
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Apple macOS. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2026-20690.
Mar 30, 2026·Zero Day Initiative
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20690
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20690
Release Notes
https://support.apple.com/en-us/126792
Release Notes
https://support.apple.com/en-us/126793
Release Notes
https://support.apple.com/en-us/126794
Release Notes
https://support.apple.com/en-us/126795
Release Notes
https://support.apple.com/en-us/126796
Release Notes
https://support.apple.com/en-us/126797
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