Is CVE-2016-9483 actively exploited?

No active exploitation of CVE-2016-9483 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2016-9483 be exploited remotely?

Yes. CVE-2016-9483 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2016-9483?

CVE-2016-9483 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2016-9483

CRITICAL

CVE-2016-9483

CWE-502Published: July 13, 2018· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

The PHP form code generated by PHP FormMail Generator deserializes untrusted input as part of the phpfmg_filman_download() function. A remote unauthenticated attacker may be able to use this vulnerability to inject PHP code, or along with CVE-2016-9484 to perform local file inclusion attacks and obtain files from the server.

NVD Source

Technical Analysis

CVE-2016-9483 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.

From a weakness classification perspective (CWE-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.