CVE-2000-0268

Medium CVSS 5

Published 2000-04-20 · last changed 2026-06-16

The fix

We hold no Microsoft remediation data for CVE-2000-0268, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

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.

Sources

NVD record for CVE-2000-0268

CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:P