CVE-2009-4178

NONECVSS 0.09.0▲
EchelonGraph scoreLOW confidence

Score elevated to 9.0 because EPSS predicts 86% probability of exploitation within the next 30 days (top 0.6% of all CVEs). Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss
Weaponized
0.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 74%
CISA-KEV: Not listedEPSS: 74%CVSS: —Exploit: NoneExposed: 0

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

Heap-based buffer overflow in OvWebHelp.exe in HP OpenView Network Node Manager (OV NNM) 7.01, 7.51, and 7.53 allows remote attackers to execute arbitrary code via a long Topic parameter.

CVSS v3
—
EG Score
9.0(low)
EPSS
99.4%
KEV
Not listed

Published

December 10, 2009

Last Modified

April 23, 2026

References (14)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 24× 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. 2026-07-06 02:19 UTCEPSS rescore
  2. 2026-07-06 02:19 UTCEPSS rescore
  3. 2026-07-01 15:02 UTCEPSS rescore
  4. 2026-06-30 23:19 UTCEPSS rescore
  5. 2026-06-28 14:03 UTCEPSS rescore
  6. 2026-06-28 04:52 UTCEPSS rescore
  7. 2026-06-28 04:52 UTCEPSS rescore
  8. 2026-06-25 13:46 UTCEPSS rescore
  9. 2026-06-25 13:46 UTCEPSS rescore
  10. 2026-06-24 14:02 UTCEPSS rescore
  11. 2026-06-24 14:02 UTCEPSS rescore
  12. 2026-06-23 21:29 UTCEPSS rescore
  13. 2026-06-23 21:29 UTCEPSS rescore
  14. 2026-06-21 14:53 UTCEPSS rescore
  15. 2026-06-18 17:49 UTCEPSS rescore
  16. 2026-06-18 17:49 UTCEPSS rescore
  17. 2026-06-17 17:49 UTCEPSS rescore
  18. 2026-06-17 17:49 UTCEPSS rescore
  19. 2026-06-15 17:44 UTCEPSS rescore
  20. 2026-06-13 22:57 UTCEPSS rescore
  21. 2026-06-12 23:08 UTCEPSS rescore
  22. 2026-06-12 23:08 UTCEPSS rescore
  23. 2026-06-10 13:17 UTCEPSS rescore
  24. 2026-06-08 14:13 UTCEPSS rescore
  25. 2026-06-07 15:22 UTCEPSS rescore
Show 20 more
  1. 2026-06-07 15:22 UTCEPSS rescore
  2. 2026-06-05 22:44 UTCEPSS rescore
  3. 2026-06-05 22:44 UTCEPSS rescore
  4. 2026-06-02 20:10 UTCEPSS rescore
  5. 2026-06-02 20:10 UTCEPSS rescore
  6. 2026-05-31 22:28 UTCEPSS rescore
  7. 2026-05-31 22:28 UTCEPSS rescore
  8. 2026-05-30 14:21 UTCEG score recompute
  9. 2026-05-30 14:21 UTCGHSA enrichment
  10. 2026-05-29 13:40 UTCEPSS rescore
  11. 2026-05-28 13:42 UTCEPSS rescore
  12. 2026-05-28 13:42 UTCEPSS rescore
  13. 2026-05-28 13:42 UTCEPSS rescore
  14. 2026-05-26 13:41 UTCEPSS rescore
  15. 2026-05-26 13:41 UTCEPSS rescore
  16. 2026-05-22 21:15 UTCEPSS rescore
  17. 2026-05-22 21:15 UTCEPSS rescore
  18. 2026-05-20 22:37 UTCEPSS rescore
  19. 2026-05-20 22:37 UTCEPSS rescore
  20. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 Metasploit module) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-16792✓ verified
    First seen Nov 11, 2010

    HP OpenView Network Node Manager (OV NNM) - 'OvWebHelp.exe' CGI Buffer Overflow (Metasploit)

    Open source ↗
  • Exploit-DBEDB-11974
    First seen Mar 30, 2010

    HP OpenView Network Node Manager (OV NNM) - 'OvWebHelp.exe' CGI Topic Overflow

    Open source ↗
  • Metasploitexploit/windows/http/hp_nnm_ovwebhelp✓ verified
    First seen Dec 9, 2009

    HP OpenView Network Node Manager OvWebHelp.exe CGI Buffer Overflow

    Open source ↗

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2009-4178?
CVE-2009-4178 is a none vulnerability published on December 10, 2009. Heap-based buffer overflow in OvWebHelp.exe in HP OpenView Network Node Manager (OV NNM) 7.01, 7.51, and 7.53 allows remote attackers to execute arbitrary code via a long Topic parameter.
When was CVE-2009-4178 disclosed?
CVE-2009-4178 was first published in the National Vulnerability Database on December 10, 2009, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2009-4178 actively exploited?
CVE-2009-4178 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2009-4178?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-4178, 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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