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CVE-2003-0717

67
FAUCET Score

CVE-2003-0717 describes a critical buffer overflow vulnerability in the Messenger Service across various Microsoft Windows operating systems, including NT, 2000, XP, and Server 2003. This flaw allows unauthenticated remote attackers to execute arbitrary code due to improper message length verification. With a CVSS score of 7.5, it is easily exploitable over the network with low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. Although not listed in CISA's KEV, multiple exploit proofs-of-concept exist on ExploitDB, and it has garnered significant community discussion, indicating its historical exploitability and potential for continued relevance in unpatched legacy systems.

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

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
58.89%
Probability of exploitation in next 30 days
EPSS Percentile
99.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
ExploitDB: EDB-385 · Aug 8, 2004
This CVE's current EPSS score of 0.5889 is in the 98th percentile among its peer group of 51,466 CVEs.

Social Chatter

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
marc.info
docs.microsoft.com / en-us/security-updates/securitybulletins/2003/ms03-043
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A213
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A268
cert.org / advisories/CA-2003-27.html
US Government Resource
kb.cert.org / vuls/id/575892
PatchThird Party AdvisoryUS Government Resource
securityfocus.com / bid/8826
ExploitPatchVendor Advisory