MEDIUM
CVE-2014-5386
CWE-310Published: December 28, 2014· Updated: Jun 17, 2026
5.0
CVSS v3.1
Official Description
The mcrypt_create_iv function in hphp/runtime/ext/mcrypt/ext_mcrypt.cpp in Facebook HipHop Virtual Machine (HHVM) before 3.3.0 does not seed the random number generator, which makes it easier for remote attackers to defeat cryptographic protection mechanisms by leveraging the use of a single initialization vector.
Technical Analysis
CVE-2014-5386 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.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityP
AvailabilityNone
AV:N/AC:L/Au:N/C:N/I:P/A:N
Affected Vendors & Products
facebook1 product(s)
hiphop virtual machine
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
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NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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All References (2)
Quick Facts
CVE IDCVE-2014-5386
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessCWE-310
CISA KEVNo
Affected1 vendor(s)
PublishedDec 28, 2014
Related CVEs (CWE-310)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2014-5386 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.