CVE-2020-1909

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-11-03 · updated 2026-06-17
Weakness: CWE-416

Description

A use-after-free in a logging library in WhatsApp for iOS prior to v2.20.111 and WhatsApp Business for iOS prior to v2.20.111 could have resulted in memory corruption, crashes and potentially code execution. This could have happened only if several events occurred together in sequence, including receiving an animated sticker while placing a WhatsApp video call on hold.

Affected products

Facebook WhatsApp for Android: before 2.20.111 — fixed in 2.20.111
Whatsapp Business: before 2.20.111 — fixed in 2.20.111

How to fix

Upgrade to a fixed version: Facebook WhatsApp for Android 2.20.111; Whatsapp Business 2.20.111. Check the vendor advisory for mitigations.

References

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