{"id":"CVE-2001-0546","aliases":["EUVD-2001-0538","GHSA-9ggc-843g-q3g8"],"status":"published","title":"Memory leak in H.323 Gatekeeper Service in Microsoft Internet Security and Acceleration (ISA)...","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.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.17341,"percentile":0.97131,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2001-09-20T04:00:00Z","modified":"2026-06-16T21:54:30Z","products":[{"vendor":"microsoft","product":"isa_server"}],"references":[{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-045","tags":["vendor-advisory","x_refsource_MS","x_transferred"]},{"url":"http://www.securityfocus.com/bid/3196","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/6989","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2001-0546"},{"url":"https://github.com/advisories/GHSA-9ggc-843g-q3g8"}],"sources":{"cve":[{"id":"CVE-2001-0546","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.","status":"published","published":"2002-03-09T05:00:00Z","modified":"2024-08-08T04:21:38.569Z","updated_at":"2026-11-02T14:34:43.358691Z"}],"euvd":[{"id":"EUVD-2001-0538","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.","status":"published","published":"2002-03-09T05:00:00Z","modified":"2024-08-08T04:21:38Z","updated_at":"2026-11-03T01:14:51.137272Z"}],"ghsa":[{"id":"GHSA-9ggc-843g-q3g8","title":"Memory leak in H.323 Gatekeeper Service in Microsoft Internet Security and Acceleration (ISA)...","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.","status":"published","published":"2022-04-30T18:16:15Z","modified":"2023-01-30T05:05:37Z","updated_at":"2026-11-02T14:47:19.332628Z"}],"nvd":[{"id":"CVE-2001-0546","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.","status":"published","published":"2001-09-20T04:00:00Z","modified":"2026-06-16T21:54:30.277Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:00:40.572315Z"}]}}