CVE-2016-20033
Wowza Streaming Engine 4.5.0 Local Privilege Escalation via nssm_x64.exe
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-639 |
| Vendor | wowza media systems, llc. |
| Product | wowza streaming engine |
| Published | Mar 15, 2026 |
| Last Updated | Mar 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Wowza Media Systems, LLC. / Wowza Streaming Engine
4.5.0
References
Credits
LiquidWorm as Gjoko Krstic of Zero Science Lab