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Vulnerability record · CVE-2001-0546 · published 20 September 2001

CVE-2001-0546: Microsoft isa server vulnerability

Microsoft · Isa Server

Memory leak in H.323 Gatekeeper Service in Microsoft Internet Security and Acceleration (ISA) Server 2000 allows remote attackers to cause a denial of service (resource exhaustion) via a large amount of malformed H.323 data.

5.0 CVSS 2.0 Medium EPSS 17% · top 3.0%
5.0CVSS 2.0 base score
17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
16 Jun 2026Last modified by NVD

Description

Memory leak in H.323 Gatekeeper Service in Microsoft Internet Security and Acceleration (ISA) Server 2000 allows remote attackers to cause a denial of service (resource exhaustion) via a large amount of malformed H.323 data.

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

Affected products

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

References

LinkTags
http://www.securityfocus.com/bid/3196
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-045
https://exchange.xforce.ibmcloud.com/vulnerabilities/6989
http://www.securityfocus.com/bid/3196
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-045
https://exchange.xforce.ibmcloud.com/vulnerabilities/6989

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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-2001-0546), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.