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TI-2009-02408 Aliases CVE-2009-2521GHSA-w8g4-h8cc-352m

Stack consumption vulnerability in the FTP Service in Microsoft Internet Information…

Priority MEDIUM 64CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Partial
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-400.

Summary

Stack consumption vulnerability in the FTP Service in Microsoft Internet Information Services (IIS) 5.0 through 7.0 allows remote authenticated users to cause a denial of service (daemon crash) via a list (ls) -R command containing a wildcard that references a subdirectory, followed by a .. (dot dot), aka "IIS FTP Service DoS Vulnerability."

Why it matters now

EPSS 0.82265 99th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:internet_information_services:*:*:*:*:*:*:*:*5.0 – 7.0VulnerableMicrosoft
  • cpe:2.3:a:microsoft:internet_information_services:*:*:*:*:*:*:*:* Versions 5.0 – 7.0 Vulnerable ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2009-2521
  2. 2026-10-03 Alias added: GHSA-w8g4-h8cc-352m

References

Patch 1

Advisory 3

Other 1

  • TI-2017-04947 Buffer overflow in the ScStoragePathFromUrl function in the WebDAV service in Internet… KEVCVSS 3.1CRITICAL 9.8
  • TI-2010-03770 Heap-based buffer overflow in the TELNET_STREAM_CONTEXT::OnSendData function in… CVSS 2.0HIGH 10.0
  • TI-2007-02725 The "hit-highlighting" functionality in webhits.dll in Microsoft Internet Information… CVSS 2.0HIGH 10.0
  • TI-2009-01456 The WebDAV extension in Microsoft Internet Information Services (IIS) 5.1 and 6.0 allows… CVSS 2.0HIGH 7.5
  • TI-2009-01064 The WebDAV extension in Microsoft Internet Information Services (IIS) 5.0 on Windows 2000… CVSS 2.0HIGH 7.5
  • TI-2005-04103 The URL parser in Microsoft Internet Information Services (IIS) 5.1 on Windows XP… CVSS 2.0HIGH 7.8
See all 90 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences