CVE-2016-6600

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
9.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 91%
CISA-KEV: Not listedEPSS: 91%CVSS: 9.8Exploit: NoneExposed: 0

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

Directory traversal vulnerability in the file upload functionality in ZOHO WebNMS Framework 5.2 and 5.2 SP1 allows remote attackers to upload and execute arbitrary JSP files via a .. (dot dot) in the fileName parameter to servlets/FileUploadServlet.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
85(Track*)
EG Risk 85/100SSVC: 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
Severity98% × 45%
Exploitation91% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
99.8%
KEV
Not listed

Published

January 23, 2017

Last Modified

May 13, 2026

Advisory Details (5)

Auto-updated Jun 21, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Full Disclosure: [CVE-2016-6600/1/2/3]: Multiple vulnerabilities (RCE, file download, etc) in WebNMS Framework 5.2 / 5.2 SP1

http://seclists.org/fulldisclosure/2016/Aug/54
generic🟡 PoC Available

PoC/advisories/webnms-5.2-sp1-pwn.txt at master · pedrib/PoC · GitHub

https://github.com/pedrib/PoC/blob/master/advisories/webnms-5.2-sp1-pwn.txt
generic
http://www.securityfocus.com/bid/92402
generic
http://www.securityfocus.com/archive/1/539159/100/0/threaded
generic🟡 PoC Available

WebNMS Framework Server 5.2/5.2 SP1 - Multiple Vulnerabilities - JSP webapps Exploit

https://www.exploit-db.com/exploits/40229/

Data Freshness Timeline

(refreshed 7× in last 7d / 13× 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. 2026-07-24 14:13 UTCEPSS rescore
  2. 2026-07-23 01:23 UTCEG score recompute
  3. 2026-07-22 22:03 UTCEG score recompute
  4. 2026-07-22 14:04 UTCEPSS rescore
  5. 2026-07-21 15:21 UTCEPSS rescore
  6. 2026-07-21 15:21 UTCEPSS rescore
  7. 2026-07-20 17:04 UTCEPSS rescore
  8. 2026-07-15 16:54 UTCEPSS rescore
  9. 2026-07-15 16:54 UTCEPSS rescore
  10. 2026-07-08 15:10 UTCEPSS rescore
  11. 2026-06-30 23:19 UTCEPSS rescore
  12. 2026-06-30 23:19 UTCEPSS rescore
  13. 2026-06-25 13:47 UTCEPSS rescore
  14. 2026-06-23 21:30 UTCEPSS rescore
  15. 2026-06-16 17:50 UTCEPSS rescore
  16. 2026-06-15 17:45 UTCEPSS rescore
  17. 2026-06-13 22:57 UTCEPSS rescore
  18. 2026-06-13 22:57 UTCEPSS rescore
  19. 2026-06-12 23:09 UTCEPSS rescore
  20. 2026-06-08 14:14 UTCEPSS rescore
  21. 2026-06-05 22:44 UTCEPSS rescore
  22. 2026-06-05 06:08 UTCEPSS rescore
  23. 2026-06-05 06:08 UTCEPSS rescore
  24. 2026-06-04 13:10 UTCEPSS rescore
  25. 2026-06-04 13:10 UTCEPSS rescore
Show 22 more
  1. 2026-05-31 00:14 UTCEPSS rescore
  2. 2026-05-27 13:38 UTCEPSS rescore
  3. 2026-05-27 13:38 UTCEPSS rescore
  4. 2026-05-26 13:42 UTCEPSS rescore
  5. 2026-05-26 13:42 UTCEPSS rescore
  6. 2026-05-24 16:44 UTCEPSS rescore
  7. 2026-05-20 22:37 UTCEPSS rescore
  8. 2026-05-20 22:37 UTCEPSS rescore
  9. 2026-05-20 22:37 UTCEPSS rescore
  10. 2026-05-20 08:44 UTCGHSA enrichment
  11. 2026-05-20 05:03 UTCGHSA enrichment
  12. 2026-05-20 01:22 UTCGHSA enrichment
  13. 2026-05-19 21:41 UTCGHSA enrichment
  14. 2026-05-19 18:00 UTCGHSA enrichment
  15. 2026-05-19 14:19 UTCGHSA enrichment
  16. 2026-05-19 10:38 UTCGHSA enrichment
  17. 2026-05-19 06:56 UTCGHSA enrichment
  18. 2026-05-19 03:15 UTCGHSA enrichment
  19. 2026-05-18 23:34 UTCEG score recompute
  20. 2026-05-18 21:30 UTCEPSS rescore
  21. 2026-05-18 21:30 UTCEPSS rescore
  22. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 Metasploit module) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-40229
    First seen Aug 10, 2016

    WebNMS Framework Server 5.2/5.2 SP1 - Multiple Vulnerabilities

    Open source ↗
  • Metasploitexploit/multi/http/webnms_file_upload✓ verified
    First seen Jul 4, 2016

    WebNMS Framework Server Arbitrary File Upload

    Open source ↗

Frequently asked(5)

What is CVE-2016-6600?
CVE-2016-6600 is a critical vulnerability published on January 23, 2017. Directory traversal vulnerability in the file upload functionality in ZOHO WebNMS Framework 5.2 and 5.2 SP1 allows remote attackers to upload and execute arbitrary JSP files via a .. (dot dot) in the fileName parameter to servlets/FileUploadServlet.
When was CVE-2016-6600 disclosed?
CVE-2016-6600 was first published in the National Vulnerability Database on January 23, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-6600 actively exploited?
CVE-2016-6600 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-6600?
CVE-2016-6600 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-6600?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-6600, 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.

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