How severe is CVE-2016-20034?

CVE-2016-20034 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-20034 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-20034?

CVE-2016-20034 affects Wowza Streaming Engine. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-20034?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2016-20034 have an EU (EUVD) identifier?

Yes. CVE-2016-20034 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2016-10823.

When was CVE-2016-20034 published?

CVE-2016-20034 was published on 2026-03-16 and last updated on 2026-06-17.

CVE-2016-20034

CVE-2016-20034 is a high-severity vulnerability in Wowza Streaming Engine with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.7
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2016-10823
Weakness: CWE-352
Affected product: Wowza Streaming Engine
Published: 2026-03-16
Last modified: 2026-06-17

Description

Wowza Streaming Engine 4.5.0 contains a privilege escalation vulnerability that allows authenticated read-only users to elevate privileges to administrator by manipulating POST parameters. Attackers can send POST requests to the user edit endpoint with accessLevel set to 'admin' and advUser parameters set to 'true' and 'on' to gain administrative access.

Frequently asked questions

What is CVE-2016-20034?: Wowza Streaming Engine 4.5.0 contains a privilege escalation vulnerability that allows authenticated read-only users to elevate privileges to administrator by manipulating POST parameters. Attackers can send POST requests to the user edit endpoint with accessLevel set to 'admin' and advUser parameters set to 'true' and 'on' to gain administrative access.
How severe is CVE-2016-20034?: CVE-2016-20034 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-20034 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-20034?: CVE-2016-20034 affects Wowza Streaming Engine. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-20034?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2016-20034 have an EU (EUVD) identifier?: Yes. CVE-2016-20034 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2016-10823.
When was CVE-2016-20034 published?: CVE-2016-20034 was published on 2026-03-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wowza:streaming_engine:4.5.0:*:*:*:*:*:*:*

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