CVE-2021-34699

HIGH

Cisco Ios - Denial of Service

Title source: rule
STIX 2.1

Description

A vulnerability in the TrustSec CLI parser of Cisco IOS and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. This vulnerability is due to an improper interaction between the web UI and the CLI parser. An attacker could exploit this vulnerability by requesting a particular CLI command to be run through the web UI. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition.

Scores

CVSS v3 7.7
EPSS 0.0070
EPSS Percentile 72.1%
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-435
Status published
Products (50)
cisco/ios 12.2\(6\)i1
cisco/ios 15.0\(1\)sy
cisco/ios 15.0\(1\)sy1
cisco/ios 15.0\(1\)sy2
cisco/ios 15.0\(1\)sy3
cisco/ios 15.0\(1\)sy4
cisco/ios 15.0\(1\)sy5
cisco/ios 15.0\(1\)sy6
cisco/ios 15.0\(1\)sy7
cisco/ios 15.0\(1\)sy7a
... and 40 more
Published Sep 23, 2021
Tracked Since Feb 18, 2026