CVE-2026-20206 (GCVE-0-2026-20206)
Vulnerability from cvelistv5
Published
2026-05-20 16:06
Modified
2026-05-21 13:06
CWE
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Summary
A vulnerability in the BrowserBot component of Cisco ThousandEyes Enterprise Agent could have allowed an authenticated, remote attacker to execute arbitrary commands on Agents on behalf of the BrowserBot synthetics orchestration process. Cisco has addressed this vulnerability in the Cisco ThousandEyes Enterprise Agent, and no customer action is needed. This vulnerability was due to insufficient input validation of command arguments that are supplied by the user. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by authenticating to the ThousandEyes SaaS and submitting crafted input into the affected parameter. A successful exploit could have allowed the attacker to execute arbitrary commands within the BrowserBot container as the node user. To exploit this vulnerability, the attacker must have valid user credentials for the ThousandEyes SaaS and the ability to manage transaction tests.
Impacted products
Vendor Product Version
Cisco Cisco ThousandEyes Enterprise Agent Version: Agent 5.0
Version: Agent 4.4.4
Version: Agent 4.4.3
Version: Agent 4.4.2
Version: Agent 4.2
Version: Agent 4.1
Version: Agent 4.0
Version: Agent 5.1
Version: Agent 5.1.2
Version: Agent 5.1.3
Create a notification for this product.
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20206",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-21T03:55:35.778187Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-21T13:06:27.356Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Cisco ThousandEyes Enterprise Agent",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "Agent 5.0"
            },
            {
              "status": "affected",
              "version": "Agent 4.4.4"
            },
            {
              "status": "affected",
              "version": "Agent 4.4.3"
            },
            {
              "status": "affected",
              "version": "Agent 4.4.2"
            },
            {
              "status": "affected",
              "version": "Agent 4.2"
            },
            {
              "status": "affected",
              "version": "Agent 4.1"
            },
            {
              "status": "affected",
              "version": "Agent 4.0"
            },
            {
              "status": "affected",
              "version": "Agent 5.1"
            },
            {
              "status": "affected",
              "version": "Agent 5.1.2"
            },
            {
              "status": "affected",
              "version": "Agent 5.1.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the BrowserBot component of Cisco ThousandEyes Enterprise Agent could have allowed an authenticated, remote attacker to execute arbitrary commands on Agents on behalf of the BrowserBot synthetics orchestration process. Cisco has addressed this vulnerability in the Cisco ThousandEyes Enterprise Agent, and no customer action is needed.\r\n\r\nThis vulnerability was due to insufficient input validation of command arguments that are supplied by the user. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by authenticating to the ThousandEyes SaaS and submitting crafted input into the affected parameter. A successful exploit could have allowed the attacker to execute arbitrary commands within the BrowserBot container as the node user.\r\nTo exploit this vulnerability, the attacker must have valid user credentials for the ThousandEyes SaaS and the ability to manage transaction tests."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.1"
          },
          "format": "cvssV3_1"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-78",
              "description": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
              "lang": "en",
              "type": "cwe"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-20T16:06:32.010Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "cisco-sa-tebbot-cmdinj-wN3yQ5gn",
          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-tebbot-cmdinj-wN3yQ5gn"
        }
      ],
      "source": {
        "advisory": "cisco-sa-tebbot-cmdinj-wN3yQ5gn",
        "defects": [
          "CSCwt71150"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Cisco ThousandEyes BrowserBot Command Injection Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2026-20206",
    "datePublished": "2026-05-20T16:06:32.010Z",
    "dateReserved": "2025-10-08T11:59:15.397Z",
    "dateUpdated": "2026-05-21T13:06:27.356Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-20206\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-21T03:55:35.778187Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-20T18:32:00.275Z\"}}], \"cna\": {\"title\": \"Cisco ThousandEyes BrowserBot Command Injection Vulnerability\", \"source\": {\"defects\": [\"CSCwt71150\"], \"advisory\": \"cisco-sa-tebbot-cmdinj-wN3yQ5gn\", \"discovery\": \"EXTERNAL\"}, \"metrics\": [{\"format\": \"cvssV3_1\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 6.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"LOW\"}}], \"affected\": [{\"vendor\": \"Cisco\", \"product\": \"Cisco ThousandEyes Enterprise Agent\", \"versions\": [{\"status\": \"affected\", \"version\": \"Agent 5.0\"}, {\"status\": \"affected\", \"version\": \"Agent 4.4.4\"}, {\"status\": \"affected\", \"version\": \"Agent 4.4.3\"}, {\"status\": \"affected\", \"version\": \"Agent 4.4.2\"}, {\"status\": \"affected\", \"version\": \"Agent 4.2\"}, {\"status\": \"affected\", \"version\": \"Agent 4.1\"}, {\"status\": \"affected\", \"version\": \"Agent 4.0\"}, {\"status\": \"affected\", \"version\": \"Agent 5.1\"}, {\"status\": \"affected\", \"version\": \"Agent 5.1.2\"}, {\"status\": \"affected\", \"version\": \"Agent 5.1.3\"}], \"defaultStatus\": \"unknown\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-tebbot-cmdinj-wN3yQ5gn\", \"name\": \"cisco-sa-tebbot-cmdinj-wN3yQ5gn\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability in the BrowserBot component of Cisco ThousandEyes Enterprise Agent could have allowed an authenticated, remote attacker to execute arbitrary commands on Agents on behalf of the BrowserBot synthetics orchestration process. Cisco has addressed this vulnerability in the Cisco ThousandEyes Enterprise Agent, and no customer action is needed.\\r\\n\\r\\nThis vulnerability was due to insufficient input validation of command arguments that are supplied by the user. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by authenticating to the ThousandEyes SaaS and submitting crafted input into the affected parameter. A successful exploit could have allowed the attacker to execute arbitrary commands within the BrowserBot container as the node user.\\r\\nTo exploit this vulnerability, the attacker must have valid user credentials for the ThousandEyes SaaS and the ability to manage transaction tests.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-78\", \"description\": \"Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2026-05-20T16:06:32.010Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-20206\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-21T13:06:27.356Z\", \"dateReserved\": \"2025-10-08T11:59:15.397Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2026-05-20T16:06:32.010Z\", \"assignerShortName\": \"cisco\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


Loading…

Loading…