A stack-based buffer overflow could be triggered in WhatsApp by sending a specially crafted MP4 file to a WhatsApp user.

published 2019-11-14 6y ago modified 2026-06-17 4mo ago also EUVD-2019-3589

cvss: 7.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits: 0; none known

A stack-based buffer overflow could be triggered in WhatsApp by sending a specially crafted MP4 file to a WhatsApp user. The issue was present in parsing the elementary stream metadata of an MP4 file and could result in a DoS or RCE. This affects Android versions prior to 2.19.274, iOS versions prior to 2.19.100, Enterprise Client versions prior to 2.25.3, Business for Android versions prior to 2.19.104 and Business for iOS versions prior to 2.19.100.

Patch / fix

fixed in 5

Facebook WhatsApp for Android 2.19.274
Facebook WhatsApp for iOS 2.19.100
Facebook WhatsApp Enterprise Client 2.25.3
Facebook WhatsApp Business for Android 2.19.104
Facebook WhatsApp Business for iOS 2.19.100

Is CVE-2019-11931 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Exploit prediction

1.21% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

Facebook WhatsApp for Android
Facebook WhatsApp for iOS
Facebook WhatsApp for Windows Phone
Facebook WhatsApp Enterprise Client
Facebook WhatsApp Business for Android
Facebook WhatsApp Business for iOS

Classification

Weakness

CWE-121 Stack-based Buffer Overflow
CWE-787 Out-of-bounds Write

References

facebook.com /security/advisories/cve-2019-11931
third-party-advisory

Sources

CVE List CVE-2019-11931
NVD CVE-2019-11931

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.