CVE-2021-35492

Name: CVE-2021-35492
Creator: NVD / NIST
Published: 2021-10-05T16:15:07.497+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 3.28%

Last modified Jun 17, 2026

CVE-2021-35492 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Wowza Streaming Engine through 4.8.11+5 could allow an authenticated, remote attacker to exhaust filesystem resources via the /enginemanager/server/vhost/historical.jsdata vhost parameter. This is due to the insufficient management of available filesystem resources. EPSS estimates a 3.28% chance of exploitation in the next 30 days.

Description

Wowza Streaming Engine through 4.8.11+5 could allow an authenticated, remote attacker to exhaust filesystem resources via the /enginemanager/server/vhost/historical.jsdata vhost parameter. This is due to the insufficient management of available filesystem resources. An attacker could exploit this vulnerability through the Virtual Host Monitoring section by requesting random virtual-host historical data and exhausting available filesystem resources. A successful exploit could allow the attacker to cause database errors and cause the device to become unresponsive to web-based management. (Manual intervention is required to free filesystem resources and return the application to an operational state.)

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

3.28%

86.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Wowza	Streaming Engine	<= 4.8.11

References

https://n4nj0.github.io/advisories/wowza-streaming-engine-i/Third Party Advisory
https://www.gruppotim.it/redteamExploit, Third Party Advisory
https://www.wowza.com/docs/wowza-streaming-engine-4-8-14-release-notesRelease Notes, Vendor Advisory
https://n4nj0.github.io/advisories/wowza-streaming-engine-i/Third Party Advisory
https://www.gruppotim.it/redteamExploit, Third Party Advisory
https://www.wowza.com/docs/wowza-streaming-engine-4-8-14-release-notesRelease Notes, Vendor Advisory

Timeline

Published: Oct 5, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-35492?

How severe is CVE-2021-35492?

CVE-2021-35492 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 3.28% probability of exploitation in the next 30 days.

How do I fix CVE-2021-35492?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-35492?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST