CVE-2020-3891

Severity: low (CVSS 2.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-04-01 · updated 2026-06-17

Description

A logic issue was addressed with improved state management. This issue is fixed in iOS 13.4 and iPadOS 13.4, watchOS 6.2. A person with physical access to a locked iOS device may be able to respond to messages even when replies are disabled.

Affected products

Apple Ipad Os: before 13.4 — fixed in 13.4
Apple Iphone Os: before 13.4 — fixed in 13.4
Apple watchOS: before 6.2 — fixed in 6.2

How to fix

Upgrade to a fixed version: Apple Ipad Os 13.4; Apple Iphone Os 13.4; Apple watchOS 6.2. Check the vendor advisory for mitigations.

References

https://support.apple.com/HT211102
https://support.apple.com/HT211103
https://support.apple.com/HT211102
https://support.apple.com/HT211103

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