CVE-2026-20199 Command injection in Cisco ThousandEyes Enterprise Agent
Authenticated attackers with admin credentials can execute arbitrary commands as root via crafted SSL certificate uploads in Cisco ThousandEyes Virtual Appliance.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-20199?
CVE-2026-20199 is a medium-severity command injection vulnerability in Cisco ThousandEyes Enterprise Agent, published on 20 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A vulnerability in the SSL certificate handling of Cisco ThousandEyes Virtual Appliance could allow an authenticated, remote attacker to execute commands on the underlying operating system as the root user. This vulnerability is due to insufficient validation of user-supplied input. An authenticated attacker could exploit this vulnerability by uploading a crafted certificate to an affected device. A successful exploit could allow the attacker to execute arbitrary code as the root user on the underlying operating system. To exploit this vulnerability, the attacker must have valid administrative credentials.
Weakness: CWE-74
Which versions are affected by CVE-2026-20199?
It affects 1 product.
Products include Cisco Thousandeyes Virtual Appliance.
How do I fix CVE-2026-20199?
No fix has been published for CVE-2026-20199 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-20199 being exploited?
There is no known exploitation of CVE-2026-20199 in the wild and no public exploit code.
Sources
Also known as GHSA-j82m-6356-v5pg.