CVE-2016-20033CWE-639

Wowza Streaming Engine 4.5.0 Local Privilege Escalation via nssm_x64.exe

High · published March 15, 2026

CVSS v4.0
8.5
EPSS
0%
Percentile
10.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.5 · HIGH
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
EPSS
0.00212 · 10.8th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-03-15T18:34Z
EPSS history
Timeline
  • 15 MAR 18:34Z
    Wowza Streaming Engine 4.5.0 Local Privilege Escalation via nssm_x64.exe
    cvelistv5