CVE-2020-3909: A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 13.4 and iPadOS 13.4, macOS Catalina 10.15.4, tvOS 13.4, watchOS 6.2…

PriorityP352critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EPSS

2.96%

85.7th percentile

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 13.4 and iPadOS 13.4, macOS Catalina 10.15.4, tvOS 13.4, watchOS 6.2, iTunes for Windows 12.10.5, iCloud for Windows 10.9.3, iCloud for Windows 7.18. Multiple issues in libxml2.

Affected

16 ranges

Vendor	Product	Version range	Fixed in
apple	icloud	< 7.18	7.18
apple	icloud	>= 10.9 < 10.9.3	10.9.3
apple	icloud_for_windows	>= unspecified < iCloud for Windows 10.9.3	iCloud for Windows 10.9.3
apple	icloud_for_windows	>= unspecified < iCloud for Windows 7.18	iCloud for Windows 7.18
apple	ios	>= unspecified < iOS 13.4 and iPadOS 13.4	iOS 13.4 and iPadOS 13.4
apple	ipados	< 13.4	13.4
apple	iphone_os	< 13.4	13.4
apple	itunes	< 12.10.5	12.10.5
apple	itunes_for_windows	>= unspecified < iTunes for Windows 12.10.5	iTunes for Windows 12.10.5
apple	mac_os_x	< 10.15.4	10.15.4
apple	macos	>= unspecified < macOS Catalina 10.15.4	macOS Catalina 10.15.4
apple	tvos	< 13.4	13.4
apple	tvos	>= unspecified < tvOS 13.4	tvOS 13.4
apple	watchos	< 6.2	6.2
apple	watchos	>= unspecified < watchOS 6.2	watchOS 6.2
oracle	sun_zfs_storage_appliance_kit_software	—	—

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.