CVE-2016-20033

Wowza Streaming Engine 4.5.0 Local Privilege Escalation via nssm_x64.exe

HIGH
7.8
CVSS Score
Published: March 15, 2026 at 06:34 PM UTC
Updated: June 17, 2026 at 12:43 AM UTC
2 products affected across 2 vendorsStreaming EngineWowza Streaming Engine

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

ExploitThird Party AdvisoryVDB Entry
Source: cverecord
https://www.exploit-db.com/exploits/40132
Vendor AdvisoryExploitThird Party Advisory
Source: cverecord
http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5339.php

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHVulnCheck
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-639

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