5.5 Medium Exploited

CVE-2020-9934 Apple iOS, iPadOS, and macOS Input Validation Vulnerability

Active exploitation observed

· CISA KEV catalogue

Required action Apply updates per vendor instructions.

Ransomware campaigns Not observed so far

Description

An issue existed in the handling of environment variables. This issue was addressed with improved validation. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6. A local user may be able to view sensitive user information.

Affected products and versions

Product	Affected versions	Fixed in
iOS	Versions not published
macOS	Versions not published

References

support.apple.com support.apple.com
support.apple.com support.apple.com

Timeline

Published October 16, 2020
Added to the KEV catalogue September 8, 2022
Last modified October 21, 2025

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