CVE-2020-1894 Memory corruption in WhatsApp Android

What is CVE-2020-1894?

CVE-2020-1894 is a high-severity memory corruption vulnerability in Facebook WhatsApp Android, published on 3 Sep 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A stack write overflow in WhatsApp for Android prior to v2.20.35, WhatsApp Business for Android prior to v2.20.20, WhatsApp for iPhone prior to v2.20.30, and WhatsApp Business for iPhone prior to v2.20.30 could have allowed arbitrary code execution when playing a specially crafted push to talk message.

Weakness: CWE-787

Which versions are affected by CVE-2020-1894?

It affects 2 products.

Products include Whatsapp Whatsapp, Whatsapp Whatsapp Business.

How do I fix CVE-2020-1894?

No fix has been published for CVE-2020-1894 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2020-1894 being exploited?

There is no known exploitation of CVE-2020-1894 in the wild and no public exploit code.

Other vulnerabilities in Facebook WhatsApp Android

• CVE-2019-3568 WhatsApp VOIP Stack Buffer Overflow Exploited Critical 9.8
• CVE-2019-18426 WhatsApp Cross-Site Scripting Exploited High 8.2
• CVE-2025-55177 Meta Platforms WhatsApp Incorrect Authorization Exploited Medium 5.4
• CVE-2022-36934 Integer overflow in WhatsApp Business for Android Critical 9.8
• CVE-2021-24042 Memory corruption in WhatsApp Business for Android Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-24p8-72r9-6qxg.