What is CVE-2019-3571?

CVE-2019-3571 is a medium-severity vulnerability in Facebook Whatsapp Desktop, classified under Improper Encoding or Escaping of Output. CVSS score: 5.3/10. Published 2019-07-16.

How severe is CVE-2019-3571?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Improper input validation in Facebook Whatsapp Desktop

CVE-2019-3571

An input validation issue affected WhatsApp Desktop versions prior to 0.3.3793 which allows malicious clients to send files to users that would be displayed with a wrong extension.

Published 2019-07-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (55.0th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Facebook Whatsapp Desktop — versions 0.3.3793, unspecified
Whatsapp

Weakness classification (CWE)

References

www.facebook.com/security/advisories/cve-2019-3571 (Third Party Advisory)

Frequently asked questions

What is CVE-2019-3571?: CVE-2019-3571 is a medium-severity vulnerability in Facebook Whatsapp Desktop, classified under Improper Encoding or Escaping of Output. CVSS score: 5.3/10. Published 2019-07-16.
How severe is CVE-2019-3571?: Medium severity. CVSS v3 base score is 5.3 out of 10.