Is CVE-2014-6229 actively exploited?

No active exploitation of CVE-2014-6229 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2014-6229 be exploited remotely?

Yes. CVE-2014-6229 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2014-6229?

CVE-2014-6229 has a CVSS score of 5.0 (MEDIUM).

HOME VULNERABILITIESCVE-2014-6229

MEDIUM

CVE-2014-6229

CWE-200Published: December 28, 2014· Updated: Jun 17, 2026

5.0

CVSS v3.1

Official Description

The HashContext class in hphp/runtime/ext/ext_hash.cpp in Facebook HipHop Virtual Machine (HHVM) before 3.3.0 incorrectly expects that a certain key string uses '\0' for termination, which allows remote attackers to obtain sensitive information by leveraging read access beyond the end of the string, and makes it easier for remote attackers to defeat cryptographic protection mechanisms by leveraging truncation of a string containing an internal '\0' character.

NVD Source

Technical Analysis

CVE-2014-6229 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.