CVE-2020-1891

A user controlled parameter used in video call in WhatsApp for Android prior to v2.20.17,...

9.8 Critical

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

1.49%Up 1.1 points since Apr 14, 2021

What each source reports

NVD Score used 9.8

Record: CVE-2020-1891
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-787
Updated: 2026-11-02

CVE List No score

Record: CVE-2020-1891
Weakness: CWE-787
Updated: 2026-11-02

EUVDEUVD-2020-12717 No score

Record: EUVD-2020-12717
Updated: 2026-11-03

GitHub AdvisoriesGHSA-fmf2-2478-rv56 No score

A user controlled parameter used in video call in WhatsApp for Android prior to v2.20.17,...

Record: GHSA-fmf2-2478-rv56
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-1891 is a critical vulnerability (CVSS 9.8) in Facebook Whatsapp Business For Android, published September 3, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.49%, the 74th percentile. No source names a fixed version.