CVE-2000-0268

Published: Apr 20, 2000Modified: Apr 16, 2026

5.0

Vector

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

Exploitability: 10.0 / Impact: 2.9

Source: NVD

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.

Affected (26)

Products: Cisco: Ios, Accesspath, As5200, As5300, As5800, System Controller 3640, Voice Gateway As5800, 3660 Router, 7100 Router, 7200 Router, 7500 Router, Ubr7200

12 products

System Controller 3640

Configuration A

21 vulnerable

Vulnerable Software	Affected Versions
Cisco Ios	Version 11.3aa
Cisco Ios	Version 12.0(2)
Cisco Ios	Version 12.0(2)xc
Cisco Ios	Version 12.0(2)xd
Cisco Ios	Version 12.0(2)xf
Cisco Ios	Version 12.0(2)xg
Cisco Ios	Version 12.0(3)t2
Cisco Ios	Version 12.0(4)
Cisco Ios	Version 12.0(4)s
Cisco Ios	Version 12.0(4)t
Cisco Ios	Version 12.0(5)
Cisco Ios	Version 12.0(6)
Cisco Ios	Version 12.0(7)t
Cisco Accesspath	Version ls-3
Cisco Accesspath	Version ts-3
Cisco Accesspath	Version vs-3
Cisco As5200	All versions
Cisco As5300	All versions
Cisco As5800	All versions
Cisco System Controller 3640	All versions
Cisco Voice Gateway As5800	All versions