What’s Vulnerable › Vulnerabilities

CVE-2020-1891

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-09-03 · updated 2026-06-17
• Weakness: CWE-787

Description

A user controlled parameter used in video call in WhatsApp for Android prior to v2.20.17, WhatsApp Business for Android prior to v2.20.7, WhatsApp for iPhone prior to v2.20.20, and WhatsApp Business for iPhone prior to v2.20.20 could have allowed an out-of-bounds write on 32-bit devices.

Affected products

• Facebook WhatsApp for Android: before 2.20.17; before 2.20.20 — fixed in 2.20.17, 2.20.20
• Whatsapp Business: before 2.20.7; before 2.20.20 — fixed in 2.20.20, 2.20.7

How to fix

Upgrade to a fixed version: Facebook WhatsApp for Android 2.20.17, 2.20.20; Whatsapp Business 2.20.20, 2.20.7. Check the vendor advisory for mitigations.

References

• https://www.whatsapp.com/security/advisories/2020
• https://www.whatsapp.com/security/advisories/2020

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