What is CVE-2016-20033?

CVE-2016-20033 is a high-severity vulnerability in Wowza Media Systems, Llc. Streaming Engine, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.8/10. Published 2026-03-15.

How severe is CVE-2016-20033?

High severity. CVSS v3 base score is 7.8 out of 10.

Auth bypass in Wowza Media Systems, Llc. Streaming Engine

CVE-2016-20033

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 gro…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.000 (6.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Wowza Media Systems, Llc. Streaming Engine — versions 4.5.0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

ExploitDB-40132 (exploit)
Vulnerability Advisory (vendor-advisory)
VulnCheck Advisory: Wowza Streaming Engine 4.5.0 Local Privilege Escalation via nssm_x64.exe (third-party-advisory)

Frequently asked questions

What is CVE-2016-20033?: CVE-2016-20033 is a high-severity vulnerability in Wowza Media Systems, Llc. Streaming Engine, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.8/10. Published 2026-03-15.
How severe is CVE-2016-20033?: High severity. CVSS v3 base score is 7.8 out of 10.