CVE-2020-1909

Name: CVE-2020-1909
Creator: NVD / NIST
Published: 2020-11-03T20:15:12.47+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.25%

Last modified Jun 17, 2026

CVE-2020-1909 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 2.25% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.25%

80.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Whatsapp	Whatsapp	< 2.20.111
Whatsapp	Whatsapp Business	< 2.20.111

References

https://www.whatsapp.com/security/advisories/2020/Vendor Advisory
https://www.whatsapp.com/security/advisories/2020/Vendor Advisory

Timeline

Published: Nov 3, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-1909?

How severe is CVE-2020-1909?

CVE-2020-1909 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.25% probability of exploitation in the next 30 days.

How do I fix CVE-2020-1909?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-1909?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST