{"schemaVersion":3,"id":"CVE-2001-0543","aliases":[],"status":"published","duplicateOf":null,"title":null,"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.","dates":{"published":"2002-03-09T05:00:00.000Z","modified":"2024-08-08T04:21:38.955Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5,"severity":"medium","version":"2.0","versionLabel":"v2.0","source":"NVD","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","computed":false,"selection":"backend-summary"},"metrics":[{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":5,"severity":"medium","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.18837,"percentile":0.97258,"severity":"medium","asOf":"2026-10-18T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-18T00:00:00.000Z","baselineScore":0.18837},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.18837,"percentile":0.97258}],"last30":[{"date":"2026-09-18T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.18837,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.18837,"percentile":0.97258}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-401","name":"Missing Release of Memory after Effective Lifetime","description":"The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.","type":"weakness","status":"Draft","abstraction":"Variant","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/401.html"}],"affected":[{"vendor":"microsoft","product":"exchange_server","name":"exchange server","label":"exchange_server","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"2000","noFixRecorded":false,"fixedIn":null}],"versionsText":"2000","eol":{"isEol":true,"eolDate":"2011-01-11T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"2000","label":"2000 SP3","eolFrom":"2011-01-11T00:00:00.000Z","isLts":false,"isMaintained":false,"latestVersion":"6.0.6620.7"},"product":{"name":"msexchange","label":"Microsoft Exchange","category":"server-app"}},"hubHref":"/vendor/microsoft/exchange_server"},{"vendor":"microsoft","product":"windows_nt","name":"windows nt","label":"windows_nt","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"4.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"4.0","eol":null,"hubHref":"/vendor/microsoft/windows_nt"}],"affectedCount":2,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/6977","label":"exchange.xforce.ibmcloud.com/vulnerabilities/6977","hostname":"exchange.xforce.ibmcloud.com","tags":["VDB Entry","X Refsource XF","Third Party Advisory"]},{"url":"http://www.securityfocus.com/bid/3183","label":"www.securityfocus.com/bid/3183","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID","Third Party Advisory"]},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-043","label":"docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-043","hostname":"docs.microsoft.com","tags":["Vendor Advisory","X Refsource MS","Patch"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A334","label":"oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A334","hostname":"oval.cisecurity.org","tags":["VDB Entry","Signature","X Refsource OVAL","Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2002-03-09T05:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-08T04:21:38.955Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":24,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T13:11:12.898Z","stale":false,"partial":false}}