CVE-2026-20657

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-20657
StatePUBLISHED
Assignerapple
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-25 01:17:04 UTC
Updated2026-05-11 21:18:50 UTC
DescriptionA buffer overflow issue was addressed with improved memory handling. 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, visionOS 26.4. Parsing a maliciously crafted file may lead to an unexpected app termination.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Problem Types: CWE-119 | CWE-125 | CWE-787 | Parsing a maliciously crafted file may lead to an unexpected app termination | CWE-119 CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer | CWE-125 CWE-125 Out-of-bounds Read | CWE-787 CWE-787 Out-of-bounds Write

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Apple Ipados All All All All
Operating System Apple Iphone Os All All All All
Operating System Apple Macos All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apple IOS And IPadOS affected 18.7.7 custom Not specified
CNA Apple IOS And IPadOS affected 26.4 custom Not specified
CNA Apple MacOS affected 14.8.5 custom Not specified
CNA Apple MacOS affected 15.7.5 custom Not specified
CNA Apple MacOS affected 26.4 custom Not specified
CNA Apple VisionOS affected 26.4 custom Not specified

References

ReferenceSourceLinkTags
support.apple.com/en-us/126793 [email protected] support.apple.com Release Notes, Vendor Advisory
support.apple.com/en-us/126795 [email protected] support.apple.com Release Notes, Vendor Advisory
support.apple.com/en-us/126794 [email protected] support.apple.com
support.apple.com/en-us/126799 [email protected] support.apple.com
support.apple.com/en-us/126796 [email protected] support.apple.com Release Notes, Vendor Advisory
support.apple.com/en-us/126792 [email protected] support.apple.com
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