What is CVE-2018-6349?

CVE-2018-6349 is a critical-severity vulnerability in Facebook Whatsapp Business For Android, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2019-06-14.

How severe is CVE-2018-6349?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Facebook Whatsapp Business For Android

CVE-2018-6349

When receiving calls using WhatsApp for Android, a missing size check when parsing a sender-provided packet allowed for a stack-based overflow. This issue affects WhatsApp for Android prior to 2.18.248 and WhatsApp Business for Android prior to 2.18.132.

Vulnerability class: Buffer Overflow

Published 2019-06-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.022 (82.5th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000

Affected products

Facebook Whatsapp Business For Android — versions 2.18.132, unspecified
Facebook Whatsapp For Android — versions 2.18.248, unspecified
Whatsapp
Whatsapp Business

Weakness classification (CWE)

References

www.facebook.com/security/advisories/cve-2018-6349/ (Third Party Advisory)
www.securityfocus.com/bid/108804 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2018-6349?: CVE-2018-6349 is a critical-severity vulnerability in Facebook Whatsapp Business For Android, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2019-06-14.
How severe is CVE-2018-6349?: Critical severity. CVSS v3 base score is 9.8 out of 10.