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Vulnerability record · CVE-2001-0543 · published 20 September 2001

CVE-2001-0543: Microsoft exchange server memory leak vulnerability

Microsoft · Exchange Server

Memory leak in NNTP service in Windows NT 4.0 and Windows 2000 allows remote attackers to cause a denial of service (memory exhaustion) via a large number of malformed posts.

5.0 CVSS 2.0 Medium EPSS 19% · top 2.8% CWE-401 · Memory leak
5.0CVSS 2.0 base score
19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

Description

Memory leak in NNTP service in Windows NT 4.0 and Windows 2000 allows remote attackers to cause a denial of service (memory exhaustion) via a large number of malformed posts.

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

Affected products

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

References

LinkTags
http://www.securityfocus.com/bid/3183 Third Party AdvisoryVDB Entry
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-043 PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/6977 Third Party AdvisoryVDB Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A334 Third Party Advisory
http://www.securityfocus.com/bid/3183 Third Party AdvisoryVDB Entry
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-043 PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/6977 Third Party AdvisoryVDB Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A334 Third Party Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2001-0543), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.