Is CVE-2016-20033 actively exploited?

No active exploitation of CVE-2016-20033 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2016-20033 be exploited remotely?

No. CVE-2016-20033 requires local access to exploit.

What is the CVSS score of CVE-2016-20033?

CVE-2016-20033 has a CVSS score of 7.8 (HIGH).

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HIGH

CVE-2016-20033

CWE-639Published: March 16, 2026· Updated: Mar 19, 2026

7.8

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:0.9th

Official Description

Wowza Streaming Engine 4.5.0 contains a local privilege escalation vulnerability that allows authenticated users to escalate privileges by replacing executable files due to improper file permissions granting full access to the Everyone group. Attackers can replace the nssm_x64.exe binary in the manager and engine service directories with malicious executables to execute code with LocalSystem privileges when services restart.

NVD Source

Technical Analysis

CVE-2016-20033 requires local access, meaning attackers must already have a foothold on the target system.

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

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 7.8.