{
  "document": {
    "acknowledgments": [
      {
        "summary": "Cisco would like to thank Dr. Oliver Matula, Tim Kornhuber, and Robin Krumnow of DB Systel GmbH for reporting this vulnerability."
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "notes": [
      {
        "category": "summary",
        "text": "A vulnerability in the web-based management API for Cisco Application Policy Infrastructure Controller (APIC) could allow an authenticated, remote attacker to execute arbitrary commands as the root user. To exploit this vulnerability, the attacker must have valid administrative credentials.\r\n\r\nThis vulnerability is due to insufficient input validation of user-controlled command arguments. An attacker could exploit this vulnerability by authenticating using the API and sending crafted input. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system of an affected device with root-level privileges.\r\n\r\nCisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.\r\n\r\n\r\n\r\nThis advisory is part of a group of advisories. For a complete list of the advisories and links to them, see Cisco Advance Notification for Publication of October 7, 2026, Security Advisories [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apic-cmdinj-L6VR4E7\"]. For further documentation of improvements and fixes in Cisco APIC, see Cisco Application Policy Infrastructure Controller Security Hardening Release: October 2026 [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apic-cmdinj-L6VR4E7\"].",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "At the time of publication, this vulnerability affected Cisco APIC, regardless of device configuration.\r\n\r\nFor information about which Cisco software releases were vulnerable at the time of publication, see the Fixed Software [\"#fs\"] section of this advisory. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.",
        "title": "Vulnerable Products"
      },
      {
        "category": "general",
        "text": "Only products listed in the Vulnerable Products [\"#vp\"] section of this advisory are known to be affected by this vulnerability.",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "There are no workarounds that address this vulnerability.",
        "title": "Workarounds"
      },
      {
        "category": "general",
        "text": "Cisco considers any workarounds and mitigations (if applicable) to be temporary solutions until an upgrade to a fixed software release is available. To remediate this vulnerability and avoid future exposure as described in this advisory, Cisco strongly recommends that customers upgrade to the fixed software indicated in this advisory.\r\n      Fixed Releases\r\nAt the time of publication, the release information in the following table was accurate. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.\r\n\r\nThe left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerability that is described in this advisory and which release included the fix for this vulnerability.\r\n        Cisco APIC Release  First Fixed Release          5.3 and earlier  Migrate to a fixed release.      6.0  6.0(9h)      6.1  6.1(6g)      6.2  6.2(3g)\r\nThe Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.",
        "title": "Fixed Software"
      },
      {
        "category": "general",
        "text": "To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy [\"http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html\"]. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.\r\n\r\nFor additional information on Cisco\u0027s vulnerability management, disclosure cadence, and software patching strategy, see Cisco\u0027s Transition to a Risk-Based Vulnerability Disclosure Model [\"https://sec.cloudapps.cisco.com/security/center/resources/risk-based-disclosure\"].",
        "title": "Vulnerability Policy"
      },
      {
        "category": "general",
        "text": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.",
        "title": "Exploitation and Public Announcements"
      },
      {
        "category": "general",
        "text": "Cisco would like to thank Dr. Oliver Matula, Tim Kornhuber, and Robin Krumnow of DB Systel GmbH for reporting this vulnerability.",
        "title": "Source"
      },
      {
        "category": "legal_disclaimer",
        "text": "SOFTWARE DOWNLOADS AND TECHNICAL SUPPORT\r\n\r\nThe Cisco Support and Downloads [\"https://www.cisco.com/c/en/us/support/index.html\"] page on Cisco.com provides information about licensing and downloads. This page can also display customer device support coverage for customers who use the My Devices tool. Please note that customers may download only software that was procured from Cisco directly or through a Cisco authorized reseller or partner and for which the license is still valid.\r\n\r\nCustomers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco Technical Assistance Center (TAC) [\"https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html\"]. Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade.\r\n\r\nWhen considering software upgrades [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes\"], customers are advised to regularly consult the advisories [\"https://www.cisco.com/go/psirt\"] for the relevant Cisco products to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) [\"https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html\"] or their contracted maintenance providers.\r\nLEGAL DISCLAIMER DETAILS\r\n\r\nCISCO DOES NOT MAKE ANY EXPRESS OR IMPLIED GUARANTEES OR WARRANTIES OF ANY KIND, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, CISCO DOES NOT GUARANTEE THE ACCURACY OR COMPLETENESS OF THIS INFORMATION. THIS DOCUMENT IS PROVIDED ON AN \"AS IS\" BASIS. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.\r\n\r\nCopies or summaries of the information contained in this Security Advisory may lack important information or contain factual errors. Customers are advised to visit the Cisco Security Advisories [\"https://www.cisco.com/go/psirt\"] page for the most recent version of this Security Advisory. The Cisco Product Security Incident Response Team (PSIRT) assesses only the affected and fixed release information that is documented in this advisory. See the Cisco Security Vulnerability Policy [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes\"] for more information.",
        "title": "Legal Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "psirt@cisco.com",
      "issuing_authority": "Cisco PSIRT",
      "name": "Cisco",
      "namespace": "https://wwww.cisco.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "Cisco Application Policy Infrastructure Controller API Command Injection Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apic-cmdinj-L6VR4E7"
      },
      {
        "category": "external",
        "summary": "Cisco Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html"
      },
      {
        "category": "external",
        "summary": "Cisco\u0027s Transition to a Risk-Based Vulnerability Disclosure Model",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/risk-based-disclosure"
      },
      {
        "category": "external",
        "summary": "Cisco Support and Downloads",
        "url": "https://www.cisco.com/c/en/us/support/index.html"
      },
      {
        "category": "external",
        "summary": "Cisco Technical Assistance Center (TAC)",
        "url": "https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html"
      },
      {
        "category": "external",
        "summary": "considering software upgrades",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes"
      },
      {
        "category": "external",
        "summary": "the advisories",
        "url": "https://www.cisco.com/go/psirt"
      }
    ],
    "title": "Cisco Application Policy Infrastructure Controller API Command Injection Vulnerability",
    "tracking": {
      "current_release_date": "2026-10-07T16:00:00+00:00",
      "generator": {
        "date": "2026-10-07T15:51:08+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-apic-cmdinj-L6VR4E7",
      "initial_release_date": "2026-10-07T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2026-10-07T15:51:04+00:00",
          "number": "1.0.0",
          "summary": "Initial public release."
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "branches": [
                  {
                    "category": "service_pack",
                    "name": "5.3(1d)",
                    "product": {
                      "name": "5.3(1d)",
                      "product_id": "CSAFPID-302159"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "5.3(2a)",
                    "product": {
                      "name": "5.3(2a)",
                      "product_id": "CSAFPID-302163"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "5.3(2b)",
                    "product": {
                      "name": "5.3(2b)",
                      "product_id": "CSAFPID-302166"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "5.3(2c)",
                    "product": {
                      "name": "5.3(2c)",
                      "product_id": "CSAFPID-302633"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "5.3(2d)",
                    "product": {
                      "name": "5.3(2d)",
                      "product_id": "CSAFPID-302969"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "5.3(2e)",
                    "product": {
                      "name": "5.3(2e)",
                      "product_id": "CSAFPID-303144"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "5.3(2f)",
                    "product": {
                      "name": "5.3(2f)",
                      "product_id": "CSAFPID-303900"
                    }
                  }
                ],
                "category": "product_version",
                "name": "5.3"
              },
              {
                "branches": [
                  {
                    "category": "service_pack",
                    "name": "6.1(5e)",
                    "product": {
                      "name": "6.1(5e)",
                      "product_id": "CSAFPID-307048"
                    }
                  }
                ],
                "category": "product_version",
                "name": "6.1"
              },
              {
                "branches": [
                  {
                    "category": "service_pack",
                    "name": "6.2(1g)",
                    "product": {
                      "name": "6.2(1g)",
                      "product_id": "CSAFPID-307050"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "6.2(2e)",
                    "product": {
                      "name": "6.2(2e)",
                      "product_id": "CSAFPID-308843"
                    }
                  }
                ],
                "category": "product_version",
                "name": "6.2"
              }
            ],
            "category": "product_family",
            "name": "Cisco Application Policy Infrastructure Controller (APIC)"
          },
          {
            "category": "product_name",
            "name": "Cisco Application Policy Infrastructure Controller (APIC)",
            "product": {
              "name": "Cisco Application Policy Infrastructure Controller (APIC)",
              "product_id": "CSAFPID-277404"
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ],
    "relationships": [
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Application Policy Infrastructure Controller (APIC) 5.3(1d) when installed on Cisco Application Policy Infrastructure Controller (APIC)",
          "product_id": "CSAFPID-302159:277404"
        },
        "product_reference": "CSAFPID-302159",
        "relates_to_product_reference": "CSAFPID-277404"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Application Policy Infrastructure Controller (APIC) 5.3(2a) when installed on Cisco Application Policy Infrastructure Controller (APIC)",
          "product_id": "CSAFPID-302163:277404"
        },
        "product_reference": "CSAFPID-302163",
        "relates_to_product_reference": "CSAFPID-277404"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Application Policy Infrastructure Controller (APIC) 5.3(2b) when installed on Cisco Application Policy Infrastructure Controller (APIC)",
          "product_id": "CSAFPID-302166:277404"
        },
        "product_reference": "CSAFPID-302166",
        "relates_to_product_reference": "CSAFPID-277404"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Application Policy Infrastructure Controller (APIC) 5.3(2c) when installed on Cisco Application Policy Infrastructure Controller (APIC)",
          "product_id": "CSAFPID-302633:277404"
        },
        "product_reference": "CSAFPID-302633",
        "relates_to_product_reference": "CSAFPID-277404"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Application Policy Infrastructure Controller (APIC) 5.3(2d) when installed on Cisco Application Policy Infrastructure Controller (APIC)",
          "product_id": "CSAFPID-302969:277404"
        },
        "product_reference": "CSAFPID-302969",
        "relates_to_product_reference": "CSAFPID-277404"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Application Policy Infrastructure Controller (APIC) 5.3(2e) when installed on Cisco Application Policy Infrastructure Controller (APIC)",
          "product_id": "CSAFPID-303144:277404"
        },
        "product_reference": "CSAFPID-303144",
        "relates_to_product_reference": "CSAFPID-277404"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Application Policy Infrastructure Controller (APIC) 5.3(2f) when installed on Cisco Application Policy Infrastructure Controller (APIC)",
          "product_id": "CSAFPID-303900:277404"
        },
        "product_reference": "CSAFPID-303900",
        "relates_to_product_reference": "CSAFPID-277404"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Application Policy Infrastructure Controller (APIC) 6.1(5e) when installed on Cisco Application Policy Infrastructure Controller (APIC)",
          "product_id": "CSAFPID-307048:277404"
        },
        "product_reference": "CSAFPID-307048",
        "relates_to_product_reference": "CSAFPID-277404"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Application Policy Infrastructure Controller (APIC) 6.2(1g) when installed on Cisco Application Policy Infrastructure Controller (APIC)",
          "product_id": "CSAFPID-307050:277404"
        },
        "product_reference": "CSAFPID-307050",
        "relates_to_product_reference": "CSAFPID-277404"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Application Policy Infrastructure Controller (APIC) 6.2(2e) when installed on Cisco Application Policy Infrastructure Controller (APIC)",
          "product_id": "CSAFPID-308843:277404"
        },
        "product_reference": "CSAFPID-308843",
        "relates_to_product_reference": "CSAFPID-277404"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-20321",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwv43177"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-202553",
          "CSAFPID-302159",
          "CSAFPID-302163",
          "CSAFPID-302166",
          "CSAFPID-302633",
          "CSAFPID-302969",
          "CSAFPID-303144",
          "CSAFPID-303900",
          "CSAFPID-307048",
          "CSAFPID-307050",
          "CSAFPID-308843"
        ]
      },
      "release_date": "2026-10-07T16:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-202553",
            "CSAFPID-302159",
            "CSAFPID-302163",
            "CSAFPID-302166",
            "CSAFPID-302633",
            "CSAFPID-302969",
            "CSAFPID-303144",
            "CSAFPID-303900",
            "CSAFPID-307048",
            "CSAFPID-307050",
            "CSAFPID-308843"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-202553",
            "CSAFPID-302159",
            "CSAFPID-302163",
            "CSAFPID-302166",
            "CSAFPID-302633",
            "CSAFPID-302969",
            "CSAFPID-303144",
            "CSAFPID-303900",
            "CSAFPID-307048",
            "CSAFPID-307050",
            "CSAFPID-308843"
          ]
        }
      ],
      "title": "Cisco Application Policy Infrastructure Controller API Command Injection Vulnerability"
    }
  ]
}