CVE-2001-0546: n/a vulnerability

CVE-2001-0546: Memory leak in H.323 Gatekeeper Service in Microsoft Internet Security and Acceleration (ISA) Server 2000 a...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 8, 2024, 04:21 UTC (UTC+00:00)

Security readout for executives and security teams

This is a legacy denial-of-service issue in Microsoft ISA Server 2000. A remote attacker could send malformed H.323 data to the H.323 Gatekeeper Service and consume server memory, potentially making the service or server unavailable. Exposure is most likely in legacy environments still running Microsoft ISA Server 2000 with the H.323 Gatekeeper Service enabled and reachable from untrusted networks. Treat this as a legacy resilience risk. It is most urgent where ISA Server 2000 still supports business traffic or is exposed externally. Mitigation focus: Review Microsoft MS01-045 for vendor-approved updates or workarounds.; Disable the H.323 Gatekeeper Service if it is not required.; Restrict H.323 Gatekeeper access to trusted networks only..

Prepared: Jul 1, 2026, 07:46 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Mar 9, 2002, 05:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
MS01-045CVE reference · vendor-advisory, x_refsource_MS
isa-h323-gatekeeper-dos(6989)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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