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Vulnerability record · CVE-2001-0909 · published 21 November 2001

CVE-2001-0909: Microsoft windows xp vulnerability

Microsoft · Windows Xp

Buffer overflow in helpctr.exe program in Microsoft Help Center for Windows XP allows remote attackers to execute arbitrary code via a long hcp: URL.

7.5 CVSS 2.0 High EPSS 20% · top 2.7%
7.5CVSS 2.0 base score
20%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

Buffer overflow in helpctr.exe program in Microsoft Help Center for Windows XP allows remote attackers to execute arbitrary code via a long hcp: URL.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://marc.info/?l=bugtraq&m=100638955422011&w=2
http://www.securityfocus.com/bid/6802 ExploitVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/7605
http://marc.info/?l=bugtraq&m=100638955422011&w=2
http://www.securityfocus.com/bid/6802 ExploitVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/7605

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2001-0909), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.