{"id":"CVE-2000-0268","aliases":["EUVD-2000-0267","GHSA-c43m-vj32-q46r"],"status":"published","title":"Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the...","description":"Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet daemon before it is ready to accept it, which causes the system to reboot.","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":0.01657,"percentile":0.76776,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2000-04-20T04:00:00Z","modified":"2026-06-16T21:51:21Z","products":[{"vendor":"cisco","product":"3660_router"},{"vendor":"cisco","product":"7100_router"},{"vendor":"cisco","product":"7200_router"},{"vendor":"cisco","product":"7500_router"},{"vendor":"cisco","product":"accesspath"},{"vendor":"cisco","product":"as5200"},{"vendor":"cisco","product":"as5300"},{"vendor":"cisco","product":"as5800"},{"vendor":"cisco","product":"ios"},{"vendor":"cisco","product":"system_controller_3640"},{"vendor":"cisco","product":"ubr7200"},{"vendor":"cisco","product":"voice_gateway_as5800"}],"references":[{"url":"http://www.securityfocus.com/bid/1123","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://www.osvdb.org/1289","tags":["vdb-entry","x_refsource_OSVDB","x_transferred"]},{"url":"http://www.cisco.com/warp/public/707/iostelnetopt-pub.shtml","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2000-0268"},{"url":"https://github.com/advisories/GHSA-c43m-vj32-q46r"}],"sources":{"cve":[{"id":"CVE-2000-0268","description":"Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet daemon before it is ready to accept it, which causes the system to reboot.","status":"published","published":"2000-06-02T04:00:00Z","modified":"2024-08-08T05:14:20.398Z","updated_at":"2026-11-02T14:33:41.23606Z"}],"euvd":[{"id":"EUVD-2000-0267","description":"Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet daemon before it is ready to accept it, which causes the system to reboot.","status":"published","published":"2000-06-02T04:00:00Z","modified":"2024-08-08T05:14:20Z","updated_at":"2026-11-03T00:56:25.912654Z"}],"ghsa":[{"id":"GHSA-c43m-vj32-q46r","title":"Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the...","description":"Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet daemon before it is ready to accept it, which causes the system to reboot.","status":"published","published":"2022-04-30T18:13:19Z","modified":"2023-01-30T05:04:31Z","updated_at":"2026-11-02T14:47:04.089519Z"}],"nvd":[{"id":"CVE-2000-0268","description":"Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet daemon before it is ready to accept it, which causes the system to reboot.","status":"published","published":"2000-04-20T04:00:00Z","modified":"2026-06-16T21:51:21.7Z","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":"2026-11-02T13:58:51.654586Z"}]}}