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.
Published: 2026-03-15
Score: 8.5 High
EPSS: < 1% Very Low
KEV: No
Impact: Local Privilege Escalation
Action: Immediate Patch
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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History

Mon, 16 Mar 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Sun, 15 Mar 2026 19:00:00 +0000

Type Values Removed Values Added
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.
Title Wowza Streaming Engine 4.5.0 Local Privilege Escalation via nssm_x64.exe
First Time appeared Wowza
Wowza streaming Engine
Weaknesses CWE-639
CPEs cpe:2.3:a:wowza:streaming_engine:4.5.0:*:*:*:*:*:*:*
Vendors & Products Wowza
Wowza streaming Engine
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.5, 'vector': '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'}


Subscriptions

Wowza Streaming Engine
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-03-16T14:30:30.462Z

Reserved: 2026-03-15T18:21:47.205Z

Link: CVE-2016-20033

cve-icon Vulnrichment

Updated: 2026-03-16T14:21:05.914Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-16T14:17:50.297

Modified: 2026-03-19T14:16:04.273

Link: CVE-2016-20033

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-23T14:01:25Z

Weaknesses