CVE-2026-20199: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in Cisco Cisco ThousandEyes Enterprise Agent
CVE-2026-20199 is a medium severity vulnerability in the Cisco ThousandEyes Enterprise Agent's SSL certificate handling. It allows an authenticated attacker with administrative credentials to upload a crafted certificate that could lead to arbitrary command execution as the root user on the underlying operating system. The issue arises from insufficient validation of user-supplied input. There is no confirmed patch or official remediation available at this time. Exploitation requires valid administrative access, and no known exploits are reported in the wild.
AI Analysis
Technical Summary
This vulnerability in Cisco ThousandEyes Enterprise Agent involves improper neutralization of special elements in SSL certificate input, enabling command injection. An attacker with valid administrative credentials can upload a maliciously crafted certificate, which the system fails to properly validate, resulting in arbitrary code execution with root privileges on the host OS. The CVSS 3.1 base score is 4.7, reflecting medium severity due to the requirement for high privileges and lack of user interaction. No patch or official fix has been documented in the vendor advisory or related sources.
Potential Impact
Successful exploitation allows an authenticated attacker with administrative rights to execute arbitrary commands as root on the underlying operating system. This could lead to full system compromise, data manipulation, or disruption of service. However, exploitation requires valid administrative credentials, limiting the attack surface. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict administrative access to trusted personnel only and monitor for unauthorized certificate uploads. Avoid uploading untrusted certificates to the affected device. Follow Cisco's official communications for updates on patches or mitigations.
CVE-2026-20199: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in Cisco Cisco ThousandEyes Enterprise Agent
Description
CVE-2026-20199 is a medium severity vulnerability in the Cisco ThousandEyes Enterprise Agent's SSL certificate handling. It allows an authenticated attacker with administrative credentials to upload a crafted certificate that could lead to arbitrary command execution as the root user on the underlying operating system. The issue arises from insufficient validation of user-supplied input. There is no confirmed patch or official remediation available at this time. Exploitation requires valid administrative access, and no known exploits are reported in the wild.
CVSS v3.1
Score 4.7medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Cisco ThousandEyes Enterprise Agent involves improper neutralization of special elements in SSL certificate input, enabling command injection. An attacker with valid administrative credentials can upload a maliciously crafted certificate, which the system fails to properly validate, resulting in arbitrary code execution with root privileges on the host OS. The CVSS 3.1 base score is 4.7, reflecting medium severity due to the requirement for high privileges and lack of user interaction. No patch or official fix has been documented in the vendor advisory or related sources.
Potential Impact
Successful exploitation allows an authenticated attacker with administrative rights to execute arbitrary commands as root on the underlying operating system. This could lead to full system compromise, data manipulation, or disruption of service. However, exploitation requires valid administrative credentials, limiting the attack surface. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict administrative access to trusted personnel only and monitor for unauthorized certificate uploads. Avoid uploading untrusted certificates to the affected device. Follow Cisco's official communications for updates on patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisco
- Date Reserved
- 2025-10-08T11:59:15.397Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a0de26bba1db473628f2736
Added to database: 05/20/2026, 16:33:47 UTC
Last enriched: 05/27/2026, 20:57:42 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 99
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