CVE-2021-31540
Wowza Streaming Engine through 4.8.5 (in a default installation) has incorrect file permissions of configuration files in the conf/ directory.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.39%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Wowza Streaming Engine through 4.8.5 (in a default installation) has incorrect file permissions of configuration files in the conf/ directory. A regular local user is able to read and write to all the configuration files, e.g., modify the application server configuration.
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.39% probability · 33th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-732
- Affected
- wowza/streaming engine
- Source
- cve@mitre.org
EPSS 0.4% 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://www.gruppotim.it/redteamExploit, Third Party Advisory
- https://www.wowza.com/docs/wowza-streaming-engine-4-8-12-release-notesRelease Notes, Vendor Advisory
- https://www.wowza.com/products/streaming-engineVendor Advisory
- https://www.gruppotim.it/redteamExploit, Third Party Advisory
- https://www.wowza.com/docs/wowza-streaming-engine-4-8-12-release-notesRelease Notes, Vendor Advisory
- https://www.wowza.com/products/streaming-engineVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.