Buffer overflow in the FTP Service in Microsoft Internet Information Services (IIS) 5.0 through 6.0 allows remote authenticated users to ex…

published 2009-08-31 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3007

cvss: 9.0; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 90.9%; EPSS 90.9% chance of exploitation in 30 days, percentile 99.8%
public exploits: 4; Metasploit, Exploit-DB

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."

Patch / fix

links 1

docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-053 advisory

Timeline

2009-08-31 First public exploit (Metasploit exploit/windows/ftp/ms09_053_ftpd_nlst)
2009-08-31 Published

Exploit prediction

90.91% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Metasploit exploit/windows/ftp/ms09_053_ftpd_nlst MS09-053 Microsoft IIS FTP Server NLST Response Overflow metasploit exploit, great rank, 2009-08-31
EDB-16740 Microsoft IIS FTP Server - NLST Response Overflow (MS09-053) (Metasploit) remote, 2010-11-12
EDB-9559 Microsoft IIS 5.0 FTP Server (Windows 2000 SP4) - Remote Stack Overflow remote, 2009-09-01
EDB-9541 Microsoft IIS 5.0/6.0 FTP Server (Windows 2000) - Remote Stack Overflow remote, 2009-08-31
securityfocus.com http://www.securityfocus.com/bid/36189 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	2.0	9.0	AV:N/AC:L/Au:S/C:C/I:C/A:C

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input

References

docs.microsoft.com /en-us/security-updates/securitybulletins/2009/ms09-053
vendor-advisory, patch
exploit-db.com /exploits/9541
exploit, third-party-advisory, vdb-entry
exploit-db.com /exploits/9559
exploit, third-party-advisory, vdb-entry
securityfocus.com /bid/36189
vdb-entry, exploit, third-party-advisory
support.microsoft.com /default.aspx?scid=kb%3B%5BLN%5D%3BQ975191
vendor-advisory
oval.cisecurity.org /repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6080
vdb-entry, signature, third-party-advisory
us-cert.gov /cas/techalerts/TA09-286A.html
third-party-advisory, us-government-resource
vupen.com /english/advisories/2009/2481
vdb-entry, third-party-advisory
kb.cert.org /vuls/id/276653
third-party-advisory, us-government-resource

Sources

CVE List CVE-2009-3023
NVD CVE-2009-3023

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary