CVE-2019-7656
A privilege escalation vulnerability in Wowza Streaming Engine 4.8.0 and earlier allows any unprivileged Linux user to escalate privileges to root.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A privilege escalation vulnerability in Wowza Streaming Engine 4.8.0 and earlier allows any unprivileged Linux user to escalate privileges to root. The installer sets too relaxed permissions on /usr/local/WowzaStreamingEngine/bin/* core program files. By injecting a payload into one of those files, it will run with the same privileges as the Wowza server, root. For example, /usr/local/WowzaStreamingEngine/bin/tune.sh could be replaced with a Trojan horse. This issue was resolved in Wowza Streaming Engine 4.8.5.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.45% probability · 39th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-732
- Affected
- wowza/streaming engine
- Source
- cve@mitre.org
EPSS 0.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2019-7656-PrivEscal-WowzaExploit, Third Party Advisory
- https://raw.githubusercontent.com/WowzaMediaSystems/public_cve/main/wowza-streaming-engine/CVE-2019-7656.txtThird Party Advisory
- https://www.wowza.com/docs/wowza-streaming-engine-4-8-5-release-notesRelease Notes, Vendor Advisory
- https://www.wowza.com/pricing/installerVendor Advisory
- https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2019-7656-PrivEscal-WowzaExploit, Third Party Advisory
- https://raw.githubusercontent.com/WowzaMediaSystems/public_cve/main/wowza-streaming-engine/CVE-2019-7656.txtThird Party Advisory
- https://www.wowza.com/docs/wowza-streaming-engine-4-8-5-release-notesRelease Notes, Vendor Advisory
- https://www.wowza.com/pricing/installerVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.