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CVE-2003-0661

30
FAUCET Score

CVE-2003-0661 describes an information disclosure vulnerability in the NetBT Name Service (NBNS) of Microsoft Windows NT 4.0, 2000, XP, and Server 2003. This flaw allows remote attackers to obtain sensitive information by observing random memory included in NBNS query responses. With a CVSS score of 5.0 (medium severity) and a FAUCET Risk Score of 96/100, the vulnerability is easily exploitable over the network with low attack complexity and no authentication required, potentially leading to confidentiality breaches. Despite its age, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or KEV entry, though it has garnered significant community discussion with 10 mentions.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_2000:*:sp1:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_2000:*:sp2:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_2000:*:sp3:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_2000:*:sp4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
25.22%
Probability of exploitation in next 30 days
EPSS Percentile
97.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.2522 is in the 98th percentile among its peer group of 23,705 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

docs.microsoft.com / en-us/security-updates/securitybulletins/2003/ms03-034
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A3483
kb.cert.org / vuls/id/989932
US Government Resource