PT-2026-42191 · Cisco · Thousandeyes Virtual Appliance

Lukasz Piotrowski + 1 · Published 2026-05-20 · Updated 2026-05-20 · CVE-2026-20199

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Name of the Vulnerable Software and Affected Versions Cisco ThousandEyes Virtual Appliance (affected versions not specified)

Description Insufficient validation of user-supplied input in the SSL certificate handling allows an authenticated remote attacker with administrative credentials to execute arbitrary commands on the underlying operating system as the root user. This is achieved by uploading a crafted certificate to the device.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Special Elements Injection

Weakness Enumeration

CWE-74

Related Identifiers

CVE-2026-20199

Affected Products

Thousandeyes Virtual Appliance

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-20199 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-tevacert-rce-RMJVEym5 · Vendor Advisory
• https://twitter.com/f1tym1/status/2057151668513341462 · Twitter Post