{"id":"CVE-1999-1228","aliases":["EUVD-1999-1209","GHSA-xqv9-mm7j-xwfh"],"status":"published","title":"Various modems that do not implement a guard time, or are configured with a guard time of 0, can...","description":"Various modems that do not implement a guard time, or are configured with a guard time of 0, can allow remote attackers to execute arbitrary modem commands such as ATH, ATH0, etc., via a \"+++\" sequence that appears in ICMP packets, the subject of an e-mail message, IRC commands, and others.","severity":{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01909,"percentile":0.79929,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"1998-09-27T04:00:00Z","modified":"2026-06-16T21:49:59Z","products":[{"vendor":"diamond","product":"supra"},{"vendor":"logicode","product":"quicktel"},{"vendor":"us_robotics","product":"us_robotics"}],"references":[{"url":"http://www.macintouch.com/modemsecurity.html","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/3320","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://marc.info/?l=bugtraq\u0026m=90695973308453\u0026w=2","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-1999-1228"},{"url":"https://github.com/advisories/GHSA-xqv9-mm7j-xwfh"}],"sources":{"cve":[{"id":"CVE-1999-1228","description":"Various modems that do not implement a guard time, or are configured with a guard time of 0, can allow remote attackers to execute arbitrary modem commands such as ATH, ATH0, etc., via a \"+++\" sequence that appears in ICMP packets, the subject of an e-mail message, IRC commands, and others.","status":"published","published":"2001-09-12T04:00:00Z","modified":"2024-08-01T17:02:53.906Z","updated_at":"2026-11-02T14:33:53.295018Z"}],"euvd":[{"id":"EUVD-1999-1209","description":"Various modems that do not implement a guard time, or are configured with a guard time of 0, can allow remote attackers to execute arbitrary modem commands such as ATH, ATH0, etc., via a \"+++\" sequence that appears in ICMP packets, the subject of an e-mail message, IRC commands, and others.","status":"published","published":"2001-09-12T04:00:00Z","modified":"2024-08-01T17:02:53Z","updated_at":"2026-11-03T03:50:43.346493Z"}],"ghsa":[{"id":"GHSA-xqv9-mm7j-xwfh","title":"Various modems that do not implement a guard time, or are configured with a guard time of 0, can...","description":"Various modems that do not implement a guard time, or are configured with a guard time of 0, can allow remote attackers to execute arbitrary modem commands such as ATH, ATH0, etc., via a \"+++\" sequence that appears in ICMP packets, the subject of an e-mail message, IRC commands, and others.","status":"published","published":"2022-04-30T18:12:05Z","modified":"2023-01-30T05:04:18Z","updated_at":"2026-11-02T14:47:01.271351Z"}],"nvd":[{"id":"CVE-1999-1228","description":"Various modems that do not implement a guard time, or are configured with a guard time of 0, can allow remote attackers to execute arbitrary modem commands such as ATH, ATH0, etc., via a \"+++\" sequence that appears in ICMP packets, the subject of an e-mail message, IRC commands, and others.","status":"published","published":"1998-09-27T04:00:00Z","modified":"2026-06-16T21:49:59.507Z","cvss":[{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T13:58:30.236077Z"}]}}