Is CVE-2018-6406 actively exploited?

No active exploitation of CVE-2018-6406 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-6406 be exploited remotely?

Yes. CVE-2018-6406 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-6406?

CVE-2018-6406 has a CVSS score of 8.8 (HIGH).

HOME VULNERABILITIESCVE-2018-6406

HIGH

CVE-2018-6406

CWE-125Published: January 30, 2018· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

The function ParseVP9SuperFrameIndex in common/libwebm_util.cc in libwebm through 2018-01-30 does not validate the child_frame_length data obtained from a .webm file, which allows remote attackers to cause an information leak or a denial of service (heap-based buffer over-read and later out-of-bounds write), or possibly have unspecified other impact.

NVD Source

Technical Analysis

CVE-2018-6406 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

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 8.8.