CVE-2016-20033
highpriority · track · 0EPSS 0.002 · 11 %ileEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.9–8.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (9)
External citations — patches, advisories, analysis.
- http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5339.phpcnnvd
- https://www.exploit-db.com/exploits/40132cnnvd
- https://www.vulncheck.com/advisories/wowza-streaming-engine-local-privilege-escalation-via-nssm-x64-execnnvd
- http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5339.phpenisa_euvd
- https://www.exploit-db.com/exploits/40132enisa_euvd
- https://www.vulncheck.com/advisories/wowza-streaming-engine-local-privilege-escalation-via-nssm-x64-exeenisa_euvd
- http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5339.phpExploitThird Party Advisorynvd
- https://www.exploit-db.com/exploits/40132ExploitThird Party AdvisoryVDB Entrynvd
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