CVE-2022-20920

HIGH

Cisco IOS - Authenticated Denial of Service via SSH Request Handling

Title source: llm
STIX 2.1

Description

A vulnerability in the SSH implementation of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. This vulnerability is due to improper handling of resources during an exceptional situation. An attacker could exploit this vulnerability by continuously connecting to an affected device and sending specific SSH requests. A successful exploit could allow the attacker to cause the affected device to reload.

References (1)

Core 1

Scores

CVSS v3 7.7
EPSS 0.0080
EPSS Percentile 51.6%
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-755
Status published
Products (50)
Cisco/Cisco IOS
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
... and 40 more
Published Oct 10, 2022
Tracked Since Feb 18, 2026