CVE-2016-20033
Wowza Streaming Engine 4.5.0 Local Privilege Escalation via nssm_x64.exe
- State
- Published
- Severity
- 8.5 High
- Published
- Mar 15, 2026
- Updated
- Mar 16, 2026
- Reserved
- Mar 15, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.5 High | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-639 Authorization Bypass Through User-Controlled Key
Affected Products
| Product | Versions |
|---|---|
Wowza Streaming EngineWowza Media Systems, LLC. |
|
References
- ExploitDB-40132exploit
- Vulnerability Advisoryvendor-advisory
- VulnCheck Advisory: Wowza Streaming Engine 4.5.0 Local Privilege Escalation via nssm_x64.exethird-party-advisory
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