Is CVE-2018-6339 actively exploited?

No active exploitation of CVE-2018-6339 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-6339 be exploited remotely?

Yes. CVE-2018-6339 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-6339?

CVE-2018-6339 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2018-6339

CWE-121Published: June 14, 2019· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

When receiving calls using WhatsApp on Android, a stack allocation failed to properly account for the amount of data being passed in. An off-by-one error meant that data was written beyond the allocated space on the stack. This issue affects WhatsApp for Android starting in version 2.18.180 and was fixed in version 2.18.295. It also affects WhatsApp Business for Android starting in version v2.18.103 and was fixed in version v2.18.150.

NVD Source

Technical Analysis

CVE-2018-6339 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.