What’s Vulnerable › Vulnerabilities

CVE-2001-0543

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 18.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2001-09-20 · updated 2026-06-16
• Weakness: CWE-401

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.

Affected products

• Microsoft Exchange Server: 2000
• Microsoft Windows 2000: all versions
• Microsoft Windows Nt: 4.0

References

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

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