Description
A vulnerability in the Secure Shell (SSH) server code of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. The vulnerability is due to an internal state not being represented correctly in the SSH state machine, which leads to an unexpected behavior. An attacker could exploit this vulnerability by creating an SSH connection to an affected device and using a specific traffic pattern that causes an error condition within that connection. A successful exploit could allow an attacker to cause the device to reload, resulting in a denial of service (DoS) condition.
Scores
CVSS v3
7.7
EPSS
0.0031
EPSS Percentile
54.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-436
CWE-371
Status
published
Products (50)
cisco/ios
12.2\(6\)i1
cisco/ios
12.2\(58\)ex
cisco/ios
12.2\(58\)ey
cisco/ios
12.2\(58\)ey1
cisco/ios
12.2\(58\)ey2
cisco/ios
12.2\(58\)ez
cisco/ios
12.2\(58\)se
cisco/ios
12.2\(58\)se1
cisco/ios
12.2\(58\)se2
cisco/ios
12.2\(60\)ez
... and 40 more
Published
Jun 03, 2020
Tracked Since
Feb 18, 2026