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CVE-2016-20033— Wowza Streaming Engine 4.5.0 Local Privilege Escalation via nssm_x64.exe

Quick assessment

Affected
Wowza Media Systems, LLC. Wowza Streaming Engine
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Wowza Media Systems Wowza Streaming Engine是美国Wowza Media Systems公司的一个强大的、可定制的和可扩展的媒体服务器软件。用于将高质量视频和音频可靠地流式传输到任何地方的任何设备。 Wowza Media Systems Wowza Streaming Engine 4.5.0版本存在安全漏洞，该漏洞源于文件权限设置不当，可能导致经过身份验证的用户通过替换可执行文件提升权限。

CVSS 7.8 · High EPSS 0.21% · P10
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I. Basic Information for CVE-2016-20033

Vulnerability Information
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Vulnerability Title
Wowza Streaming Engine 4.5.0 Local Privilege Escalation via nssm_x64.exe
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
Wowza Media Systems Wowza Streaming Engine 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wowza Media Systems Wowza Streaming Engine是美国Wowza Media Systems公司的一个强大的、可定制的和可扩展的媒体服务器软件。用于将高质量视频和音频可靠地流式传输到任何地方的任何设备。 Wowza Media Systems Wowza Streaming Engine 4.5.0版本存在安全漏洞，该漏洞源于文件权限设置不当，可能导致经过身份验证的用户通过替换可执行文件提升权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Wowza Media Systems, LLC. Wowza Streaming Engine 4.5.0 -

II. Public POCs for CVE-2016-20033

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III. Intelligence Information for CVE-2016-20033

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Vendor Advisories for CVE-2016-20033 (1)

Exploits & Public PoCs for CVE-2016-20033 (1)

Proof of Concept for CVE-2016-20033 (1)

Same Patch Batch · Wowza Media Systems, LLC. · 2026-03-15 · 4 CVEs total

CVE-2016-20034 8.8 HIGH Wowza Streaming Engine 4.5.0 Privilege Escalation via user edit
CVE-2016-20036 6.1 MEDIUM Wowza Streaming Engine 4.5.0 Multiple Cross-Site Scripting Vulnerabilities
CVE-2016-20035 5.3 MEDIUM Wowza Streaming Engine 4.5.0 CSRF via user edit endpoint

IV. Related Vulnerabilities

Same product: Wowza Streaming Engine
Same vendor: Wowza Media Systems, LLC.
Same weakness: CWE-639

V. Comments for CVE-2016-20033

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