CVE-2016-20034

HIGHNVD 8.08.8▲
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-03-16. NVD baseline CVSS 8.0; sources differ by 0.8.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.0Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.0
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
11%
KEV
Not listed

Published

March 16, 2026

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Aug 2, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

Wowza Streaming Engine 4.5.0 Privilege Escalation via user edit | Advisories | VulnCheck

https://www.vulncheck.com/advisories/wowza-streaming-engine-privilege-escalation-via-user-edit
generic🟡 PoC Available

Wowza Streaming Engine 4.5.0 - Remote Privilege Escalation - Multiple webapps Exploit

https://www.exploit-db.com/exploits/40133
generic🔴 Active Exploitation

Zero Science Lab — Information Security Research & Development Laboratory

http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5340.php

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 17× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 15:35 UTCEPSS rescore
  2. 2026-09-18 19:22 UTCEPSS rescore
  3. 2026-09-17 19:21 UTCEPSS rescore
  4. 2026-09-15 03:05 UTCEPSS rescore
  5. 2026-09-13 16:41 UTCEPSS rescore
  6. 2026-09-12 14:55 UTCEPSS rescore
  7. 2026-09-10 09:26 UTCEPSS rescore
  8. 2026-09-07 15:56 UTCEPSS rescore
  9. 2026-09-04 13:56 UTCEPSS rescore
  10. 2026-09-02 14:07 UTCEPSS rescore
  11. 2026-09-01 03:31 UTCEPSS rescore
  12. 2026-08-30 19:12 UTCEPSS rescore
  13. 2026-08-27 14:20 UTCEPSS rescore
  14. 2026-08-26 14:41 UTCEPSS rescore
  15. 2026-08-25 13:44 UTCEPSS rescore
  16. 2026-08-23 00:13 UTCEPSS rescore
  17. 2026-08-21 23:44 UTCEPSS rescore
  18. 2026-08-19 16:59 UTCEPSS rescore
  19. 2026-08-18 13:43 UTCEPSS rescore
  20. 2026-08-17 13:42 UTCEPSS rescore
  21. 2026-08-16 14:51 UTCEPSS rescore
  22. 2026-08-16 11:33 UTCEG score recompute
  23. 2026-08-16 11:33 UTCGHSA enrichment
  24. 2026-08-16 02:09 UTCEPSS rescore
  25. 2026-08-15 01:25 UTCEPSS rescore
Show 40 more
  1. 2026-08-14 20:09 UTCGHSA enrichment
  2. 2026-08-14 07:35 UTCEG score recompute
  3. 2026-08-14 07:35 UTCGHSA enrichment
  4. 2026-08-12 22:32 UTCEG score recompute
  5. 2026-08-12 22:32 UTCGHSA enrichment
  6. 2026-08-12 13:46 UTCEPSS rescore
  7. 2026-08-11 21:39 UTCEG score recompute
  8. 2026-08-11 21:38 UTCGHSA enrichment
  9. 2026-08-11 13:36 UTCEPSS rescore
  10. 2026-08-11 04:46 UTCEG score recompute
  11. 2026-08-11 04:46 UTCGHSA enrichment
  12. 2026-08-10 08:18 UTCGHSA enrichment
  13. 2026-08-09 19:44 UTCEG score recompute
  14. 2026-08-09 19:44 UTCGHSA enrichment
  15. 2026-08-09 13:42 UTCEPSS rescore
  16. 2026-08-09 07:12 UTCEG score recompute
  17. 2026-08-09 07:12 UTCGHSA enrichment
  18. 2026-08-08 16:32 UTCEPSS rescore
  19. 2026-08-08 06:25 UTCGHSA enrichment
  20. 2026-08-07 17:52 UTCEG score recompute
  21. 2026-08-07 17:52 UTCGHSA enrichment
  22. 2026-08-06 19:44 UTCEG score recompute
  23. 2026-08-06 19:44 UTCGHSA enrichment
  24. 2026-08-06 13:42 UTCEPSS rescore
  25. 2026-08-06 01:50 UTCEG score recompute
  26. 2026-08-06 01:50 UTCGHSA enrichment
  27. 2026-08-05 19:12 UTCEPSS rescore
  28. 2026-08-04 15:04 UTCEPSS rescore
  29. 2026-08-04 10:32 UTCEPSS rescore
  30. 2026-08-04 01:04 UTCEG score recompute
  31. 2026-08-04 01:04 UTCGHSA enrichment
  32. 2026-08-02 17:10 UTCEG score recompute
  33. 2026-08-02 17:10 UTCGHSA enrichment
  34. 2026-08-02 02:22 UTCEPSS rescore
  35. 2026-08-01 04:11 UTCEPSS rescore
  36. 2026-07-30 16:23 UTCEPSS rescore
  37. 2026-07-30 01:26 UTCEPSS rescore
  38. 2026-07-28 15:31 UTCEPSS rescore
  39. 2026-07-27 13:38 UTCEG score recompute
  40. 2026-07-27 13:38 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2016-20034?
CVE-2016-20034 is a high vulnerability published on March 16, 2026. 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…
When was CVE-2016-20034 disclosed?
CVE-2016-20034 was first published in the National Vulnerability Database on March 16, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-20034 actively exploited?
CVE-2016-20034 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 88.6% of all scored CVEs.
What is the CVSS score of CVE-2016-20034?
CVE-2016-20034 has a CVSS v3 base score of 8.0 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.8.
How do I remediate CVE-2016-20034?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-20034, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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