CVE-2021-34699
high-risk
Published 2021-09-23
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.
Do I need to act?
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0.70% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.7/10
High
NETWORK
/ LOW complexity
Affected Products (20)
Affected Vendors
References (2)
62
/ 100
high-risk
Severity
27/34 · High
Exploitability
2/34 · Minimal
Exposure
33/34 · Critical