CVE-2016-6601

HIGHNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because EPSS predicts 97% probability of exploitation within the next 30 days (top 0.1% of all CVEs). NVD baseline CVSS 7.5 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Weaponized
7.5
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 97%
CISA-KEV: Not listedEPSS: 97%CVSS: 7.5Exploit: 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 download functionality in ZOHO WebNMS Framework 5.2 and 5.2 SP1 allows remote attackers to read arbitrary files via a .. (dot dot) in the fileName parameter to servlets/FetchFile.

CVSS v3
7.5
EG Score
9.0(high)
EG Risk
84(Track)
EG Risk 84/100SSVC: 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
Severity90% × 45%
Exploitation97% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
99.9%
KEV
Not listed

Published

January 23, 2017

Last Modified

May 13, 2026

References (20)

Data Freshness Timeline

(refreshed 4× in last 7d / 9× 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. 2026-07-23 01:23 UTCEG score recompute
  2. 2026-07-22 22:03 UTCEG score recompute
  3. 2026-07-18 10:00 UTCEPSS rescore
  4. 2026-07-18 10:00 UTCEPSS rescore
  5. 2026-07-08 15:10 UTCEPSS rescore
  6. 2026-07-01 15:02 UTCEPSS rescore
  7. 2026-06-30 23:19 UTCEPSS rescore
  8. 2026-06-30 23:19 UTCEPSS rescore
  9. 2026-06-28 04:53 UTCEPSS rescore
  10. 2026-06-23 21:30 UTCEPSS rescore
  11. 2026-06-15 17:45 UTCEPSS rescore
  12. 2026-06-12 23:09 UTCEPSS rescore
  13. 2026-06-08 14:14 UTCEPSS rescore
  14. 2026-06-05 22:44 UTCEPSS rescore
  15. 2026-05-31 00:14 UTCEPSS rescore
  16. 2026-05-29 13:41 UTCEPSS rescore
  17. 2026-05-22 16:58 UTCEG score recompute
  18. 2026-05-22 16:58 UTCGHSA enrichment
  19. 2026-05-20 22:37 UTCEPSS rescore
  20. 2026-05-20 22:37 UTCEPSS rescore
  21. 2026-05-20 22:37 UTCEPSS rescore
  22. 2026-05-20 18:33 UTCOSV refresh
  23. 2026-05-20 11:21 UTCEPSS rescore
  24. 2026-05-20 11:21 UTCEPSS rescore
  25. 2026-05-18 21:30 UTCEPSS rescore
Show 2 more
  1. 2026-05-18 21:30 UTCEPSS rescore
  2. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(4 references)

Working exploit code is in the public domain (2 Metasploit modules) (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 ↗
  • Metasploitauxiliary/admin/http/webnms_cred_disclosure✓ verified
    First seen Jul 4, 2016

    WebNMS Framework Server Credential Disclosure

    Open source ↗
  • Metasploitauxiliary/admin/http/webnms_file_download✓ verified
    First seen Jul 4, 2016

    WebNMS Framework Server Arbitrary Text File Download

    Open source ↗
  • Nucleihttp/cves/2016/CVE-2016-6601.yaml
    First seen Jan 1, 2016

    ZOHO WebNMS Framework <5.2 SP1 - Local File Inclusion

    Open source ↗

Frequently asked(5)

What is CVE-2016-6601?
CVE-2016-6601 is a high vulnerability published on January 23, 2017. Directory traversal vulnerability in the file download functionality in ZOHO WebNMS Framework 5.2 and 5.2 SP1 allows remote attackers to read arbitrary files via a .. (dot dot) in the fileName parameter to servlets/FetchFile.
When was CVE-2016-6601 disclosed?
CVE-2016-6601 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-2016-6601 actively exploited?
CVE-2016-6601 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-6601?
CVE-2016-6601 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2016-6601?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-6601, 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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