CVE-2019-7656

A privilege escalation vulnerability in Wowza Streaming Engine 4.7.7 and 4.7.8 allows any...

7.8 High

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.45%Down 0.6 points since Apr 14, 2021

What each source reports

NVD Score used 7.8

Record: CVE-2019-7656
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.2 HighAV:L/AC:L/Au:N/C:C/I:C/A:C
Weakness: CWE-732
Updated: 2026-11-02

CVE List No score

Record: CVE-2019-7656
Updated: 2026-11-02

EUVDEUVD-2019-17188 No score

Record: EUVD-2019-17188
Updated: 2026-11-03

GitHub AdvisoriesGHSA-6pq8-9hcx-5r62 7.8

A privilege escalation vulnerability in Wowza Streaming Engine 4.7.7 and 4.7.8 allows any...

A privilege escalation vulnerability in Wowza Streaming Engine 4.7.7 and 4.7.8 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.

Record: GHSA-6pq8-9hcx-5r62
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-276, CWE-732
Updated: 2026-11-02

Affected products

wowza streaming engine

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-7656 is a high vulnerability (CVSS 7.8) in Wowza Streaming Engine, published January 29, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.45%, the 39th percentile. No source names a fixed version.