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.

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Wowza Media Systems, LLC. Wowza Streaming Engine affected
Version Status Constraints
4.5.0 affected
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Project Subscriptions

Vendors Products
Wowza Subscribe
Streaming Engine Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5339.php cve-icon
https://www.exploit-db.com/exploits/40132 cve-icon
https://www.vulncheck.com/advisories/wowza-streaming-engine-local-privilege-escalation-via-nssm-x64-exe cve-icon
History

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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-03-15T18:34:21.181Z

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

Link: CVE-2016-20033

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses