CVE-2009-3023

HIGHCVSS v2 · 9.09.0—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 9.0 — v2 rates that HIGH (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:L/Au:S/C:C/I:C/A:C. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 90.9% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Trending — 3 sources updated this weekWeaponized
9.0EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 91%
  • Public exploit code is available (Metasploit, Exploit-DB (verified), epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 91%CVSS v2: 9.0Exploit: Metasploit · Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed: 0

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

Buffer overflow in the FTP Service in Microsoft Internet Information Services (IIS) 5.0 through 6.0 allows remote authenticated users to execute arbitrary code via a crafted NLST (NAME LIST) command that uses wildcards, leading to memory corruption, aka "IIS FTP Service RCE and DoS Vulnerability."

CVSS v2.0 (legacy)
9.0HIGHNVD never assigned a CVSS v3 rating to this CVE
EG Score
9.0(low)
EG Risk
81(Track)
EG Risk 81/100SSVC: 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%
Exploitation91% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
91%
EPSS %ILE
100%
KEV
Not listed

Published

August 31, 2009

Last Modified

April 23, 2026

References (18)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 35× in last 7d / 39× 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. 2026-07-26 13:38 UTCEG score recompute▲ 9.00
  2. 2026-07-24 14:12 UTCEPSS rescore
  3. 2026-07-23 01:06 UTCGHSA enrichment
  4. 2026-07-23 01:05 UTCGHSA enrichment
  5. 2026-07-23 01:04 UTCGHSA enrichment
  6. 2026-07-23 01:03 UTCGHSA enrichment
  7. 2026-07-23 01:02 UTCGHSA enrichment
  8. 2026-07-23 01:02 UTCGHSA enrichment
  9. 2026-07-23 01:01 UTCGHSA enrichment
  10. 2026-07-23 00:59 UTCGHSA enrichment
  11. 2026-07-23 00:58 UTCGHSA enrichment
  12. 2026-07-23 00:57 UTCGHSA enrichment
  13. 2026-07-23 00:56 UTCGHSA enrichment
  14. 2026-07-23 00:55 UTCGHSA enrichment
  15. 2026-07-23 00:54 UTCGHSA enrichment
  16. 2026-07-23 00:53 UTCGHSA enrichment
  17. 2026-07-23 00:52 UTCGHSA enrichment
  18. 2026-07-23 00:51 UTCGHSA enrichment
  19. 2026-07-23 00:50 UTCGHSA enrichment
  20. 2026-07-23 00:49 UTCGHSA enrichment
  21. 2026-07-23 00:48 UTCGHSA enrichment
  22. 2026-07-23 00:47 UTCGHSA enrichment
  23. 2026-07-23 00:46 UTCGHSA enrichment
  24. 2026-07-23 00:44 UTCGHSA enrichment
  25. 2026-07-23 00:43 UTCGHSA enrichment
Show 55 more
  1. 2026-07-23 00:43 UTCGHSA enrichment
  2. 2026-07-23 00:42 UTCEG score recompute
  3. 2026-07-23 00:42 UTCGHSA enrichment
  4. 2026-07-23 00:40 UTCGHSA enrichment
  5. 2026-07-23 00:37 UTCGHSA enrichment
  6. 2026-07-23 00:37 UTCEG score recompute▼ 9.00
  7. 2026-07-23 00:04 UTCEG score recompute
  8. 2026-07-22 21:35 UTCEG score recompute▲ 9.00
  9. 2026-07-22 21:35 UTCGHSA enrichment
  10. 2026-07-22 14:03 UTCEPSS rescore
  11. 2026-07-15 16:54 UTCEPSS rescore
  12. 2026-07-15 16:54 UTCEPSS rescore
  13. 2026-07-06 02:19 UTCEPSS rescore
  14. 2026-07-06 02:19 UTCEPSS rescore
  15. 2026-06-27 03:05 UTCEPSS rescore
  16. 2026-06-24 14:02 UTCEPSS rescore
  17. 2026-06-24 14:02 UTCEPSS rescore
  18. 2026-06-23 21:29 UTCEPSS rescore
  19. 2026-06-23 21:29 UTCEPSS rescore
  20. 2026-06-16 17:49 UTCEPSS rescore
  21. 2026-06-16 17:49 UTCEPSS rescore
  22. 2026-06-15 17:44 UTCEPSS rescore
  23. 2026-06-13 22:57 UTCEPSS rescore
  24. 2026-06-12 23:08 UTCEPSS rescore
  25. 2026-06-12 23:08 UTCEPSS rescore
  26. 2026-06-10 22:14 UTCEPSS rescore
  27. 2026-06-10 13:17 UTCEPSS rescore
  28. 2026-06-08 14:13 UTCEPSS rescore
  29. 2026-06-07 15:22 UTCEPSS rescore
  30. 2026-06-07 15:22 UTCEPSS rescore
  31. 2026-06-06 13:44 UTCEPSS rescore
  32. 2026-06-06 13:44 UTCEPSS rescore
  33. 2026-06-06 13:44 UTCEPSS rescore
  34. 2026-06-05 22:44 UTCEPSS rescore
  35. 2026-06-05 22:44 UTCEPSS rescore
  36. 2026-06-05 06:07 UTCEPSS rescore
  37. 2026-06-04 13:09 UTCEPSS rescore
  38. 2026-06-04 13:09 UTCEPSS rescore
  39. 2026-06-01 13:49 UTCEPSS rescore
  40. 2026-06-01 13:49 UTCEPSS rescore
  41. 2026-05-31 22:28 UTCEPSS rescore
  42. 2026-05-31 22:28 UTCEPSS rescore
  43. 2026-05-31 00:13 UTCEPSS rescore
  44. 2026-05-31 00:13 UTCEPSS rescore
  45. 2026-05-30 15:32 UTCEG score recompute
  46. 2026-05-30 15:32 UTCGHSA enrichment
  47. 2026-05-29 13:40 UTCEPSS rescore
  48. 2026-05-28 13:42 UTCEPSS rescore
  49. 2026-05-28 13:42 UTCEPSS rescore
  50. 2026-05-28 13:42 UTCEPSS rescore
  51. 2026-05-22 21:15 UTCEPSS rescore
  52. 2026-05-22 21:15 UTCEPSS rescore
  53. 2026-05-20 22:37 UTCEPSS rescore
  54. 2026-05-20 22:37 UTCEPSS rescore
  55. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(4 references)

Working exploit code is in the public domain (1 Metasploit module) (3 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-16740✓ verified
    First seen Nov 12, 2010

    Microsoft IIS FTP Server - NLST Response Overflow (MS09-053) (Metasploit)

    Open source ↗
  • Exploit-DBEDB-9559✓ verified
    First seen Sep 1, 2009

    Microsoft IIS 5.0 FTP Server (Windows 2000 SP4) - Remote Stack Overflow

    Open source ↗
  • Exploit-DBEDB-9541✓ verified
    First seen Aug 31, 2009

    Microsoft IIS 5.0/6.0 FTP Server (Windows 2000) - Remote Stack Overflow

    Open source ↗
  • Metasploitexploit/windows/ftp/ms09_053_ftpd_nlst✓ verified
    First seen Aug 31, 2009

    MS09-053 Microsoft IIS FTP Server NLST Response Overflow

    Open source ↗

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2009-3023?
CVE-2009-3023 is a high vulnerability published on August 31, 2009. Buffer overflow in the FTP Service in Microsoft Internet Information Services (IIS) 5.0 through 6.0 allows remote authenticated users to execute arbitrary code via a crafted NLST (NAME LIST) command that uses wildcards, leading to memory corruption, aka "IIS FTP Service RCE and DoS Vulnerability."
When was CVE-2009-3023 disclosed?
CVE-2009-3023 was first published in the National Vulnerability Database on August 31, 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-2009-3023 actively exploited?
CVE-2009-3023 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91% probability of exploitation in the next 30 days, which ranks it in the top 0.2% of all scored CVEs.
How do I remediate CVE-2009-3023?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-3023, 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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