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CVE-2003-0349

79
FAUCET Score

CVE-2003-0349 describes a buffer overflow vulnerability in the nsiislog.dll component of Microsoft Windows Media Services, specifically when installed with IIS 5.0 on Windows 2000. This flaw allows unauthenticated remote attackers to execute arbitrary code by sending a crafted, large POST request to the affected ISAPI extension. With a CVSS score of 7.5, this vulnerability is considered highly severe due to its network-based attack vector, low complexity, and potential for complete compromise of confidentiality, integrity, and availability. While not currently on the KEV catalog or Hot List, multiple public exploit modules exist, including Metasploit and ExploitDB entries, indicating readily available exploit code, despite minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
80.27%
Probability of exploitation in next 30 days
EPSS Percentile
99.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: MS03-022 Microsoft IIS ISAPI nsiislog.dll ISAPI POST Overflow · Jun 25, 2003
ExploitDB: EDB-16355 · Jul 25, 2010
This CVE's current EPSS score of 0.8027 is in the 99th percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

marc.info
docs.microsoft.com / en-us/security-updates/securitybulletins/2003/ms03-022
secunia.com / advisories/9115
securitytracker.com / id
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A938
kb.cert.org / vuls/id/113716
US Government Resource
ntbugtraq.com / default.asp
ExploitPatchVendor Advisory