{"id":"CVE-2006-3216","aliases":["EUVD-2006-3213","GHSA-hm7g-g5vp-28g4"],"status":"published","title":"Clearswift MAILsweeper for SMTP before 4.3.20 and MAILsweeper for Exchange before 4.3.20 allows...","description":"Clearswift MAILsweeper for SMTP before 4.3.20 and MAILsweeper for Exchange before 4.3.20 allows remote attackers to cause a denial of service via (1) non-ASCII characters in a reverse DNS lookup result from a Received header, which leads to a Receiver service stop, and (2) unspecified vectors involving malformed messages, which causes \"unpredictable behavior\" that prevents the Security service from processing more messages.","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":0.01856,"percentile":0.79334,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2006-06-24T01:00:00Z","modified":"2026-06-16T22:26:38Z","products":[{"vendor":"clearswift","product":"mailsweeper_for_exchange"},{"vendor":"clearswift","product":"mailsweeper_for_smtp"}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/27305","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://www.osvdb.org/26739","tags":["vdb-entry","x_refsource_OSVDB","x_transferred"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/27303","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://download.mimesweeper.com/www/TechnicalDocumentation/ReadMe_MSW_4%2C3%2C20.htm","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://www.securityfocus.com/bid/18584","tags":["vdb-entry","x_refsource_BID","x_transferred","Patch"]},{"url":"http://secunia.com/advisories/20756","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Patch","Vendor Advisory"]},{"url":"http://www.osvdb.org/26738","tags":["vdb-entry","x_refsource_OSVDB","x_transferred"]},{"url":"http://www.vupen.com/english/advisories/2006/2473","tags":["vdb-entry","x_refsource_VUPEN","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2006-3216"},{"url":"http://download.mimesweeper.com/www/TechnicalDocumentation/ReadMe_MSW_4,3,20.htm"},{"url":"https://github.com/advisories/GHSA-hm7g-g5vp-28g4"}],"sources":{"cve":[{"id":"CVE-2006-3216","description":"Clearswift MAILsweeper for SMTP before 4.3.20 and MAILsweeper for Exchange before 4.3.20 allows remote attackers to cause a denial of service via (1) non-ASCII characters in a reverse DNS lookup result from a Received header, which leads to a Receiver service stop, and (2) unspecified vectors involving malformed messages, which causes \"unpredictable behavior\" that prevents the Security service from processing more messages.","status":"published","published":"2006-06-24T01:00:00Z","modified":"2024-08-07T18:23:21.175Z","updated_at":"2026-11-02T14:33:50.024504Z"}],"euvd":[{"id":"EUVD-2006-3213","description":"Clearswift MAILsweeper for SMTP before 4.3.20 and MAILsweeper for Exchange before 4.3.20 allows remote attackers to cause a denial of service via (1) non-ASCII characters in a reverse DNS lookup result from a Received header, which leads to a Receiver service stop, and (2) unspecified vectors involving malformed messages, which causes \"unpredictable behavior\" that prevents the Security service from processing more messages.","status":"published","published":"2006-06-24T01:00:00Z","modified":"2024-08-07T18:23:21Z","updated_at":"2026-11-03T01:15:57.220997Z"}],"ghsa":[{"id":"GHSA-hm7g-g5vp-28g4","title":"Clearswift MAILsweeper for SMTP before 4.3.20 and MAILsweeper for Exchange before 4.3.20 allows...","description":"Clearswift MAILsweeper for SMTP before 4.3.20 and MAILsweeper for Exchange before 4.3.20 allows remote attackers to cause a denial of service via (1) non-ASCII characters in a reverse DNS lookup result from a Received header, which leads to a Receiver service stop, and (2) unspecified vectors involving malformed messages, which causes \"unpredictable behavior\" that prevents the Security service from processing more messages.","status":"published","published":"2022-05-01T07:06:45Z","modified":"2025-04-03T04:36:23Z","updated_at":"2026-11-02T15:00:46.038216Z"}],"nvd":[{"id":"CVE-2006-3216","description":"Clearswift MAILsweeper for SMTP before 4.3.20 and MAILsweeper for Exchange before 4.3.20 allows remote attackers to cause a denial of service via (1) non-ASCII characters in a reverse DNS lookup result from a Received header, which leads to a Receiver service stop, and (2) unspecified vectors involving malformed messages, which causes \"unpredictable behavior\" that prevents the Security service from processing more messages.","status":"published","published":"2006-06-24T01:06:00Z","modified":"2026-06-16T22:26:38.493Z","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":"2026-11-02T14:01:04.288594Z"}]}}