{
    "document": {
        "category": "csaf_base",
        "csaf_version": "2.0",
        "distribution": {
            "tlp": {
                "label": "WHITE"
            }
        },
        "lang": "en",
        "notes": [
            {
                "category": "legal_disclaimer",
                "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
            }
        ],
        "publisher": {
            "category": "coordinator",
            "contact_details": "cert@ncsc.nl",
            "name": "National Cyber Security Centre",
            "namespace": "https://www.ncsc.nl/"
        },
        "title": "CVE-2026-101156",
        "tracking": {
            "current_release_date": "2026-10-08T19:09:12.122408Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
                    "version": "1.7"
                }
            },
            "id": "CVE-2026-101156",
            "initial_release_date": "2026-10-06T20:39:45.516115Z",
            "revision_history": [
                {
                    "date": "2026-10-06T20:39:45.516115Z",
                    "number": "1",
                    "summary": "CVSS created.| CWES created (1).| Unknown change.| Products created (1).| References created (1).| Description created for source.| Unknown change."
                },
                {
                    "date": "2026-10-06T20:39:51.098173Z",
                    "number": "2",
                    "summary": "NCSC Score created."
                },
                {
                    "date": "2026-10-06T20:41:01.681213Z",
                    "number": "3",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1).| CWES updated (1)."
                },
                {
                    "date": "2026-10-06T20:41:04.954824Z",
                    "number": "4",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-10-07T00:03:50.172133Z",
                    "number": "5",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CWES updated (1)."
                },
                {
                    "date": "2026-10-07T00:03:59.964986Z",
                    "number": "6",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-10-07T00:04:11.678731Z",
                    "number": "7",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| Product Remediations created (2).| Products connected (1).| References created (2)."
                },
                {
                    "date": "2026-10-07T00:04:13.055741Z",
                    "number": "8",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-10-08T19:05:41.926245Z",
                    "number": "9",
                    "summary": "EPSS created.| Unknown change."
                },
                {
                    "date": "2026-10-08T19:09:07.488745Z",
                    "number": "10",
                    "summary": "NCSC Score updated."
                }
            ],
            "status": "interim",
            "version": "10"
        }
    },
    "product_tree": {
        "branches": [
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/2025.2.0|<=2026.2.0",
                                "product": {
                                    "name": "vers:unknown/2025.2.0|<=2026.2.0",
                                    "product_id": "CSAFPID-9530457"
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "CloudVision CUE"
                    },
                    {
                        "branches": [
                            {
                                "branches": [
                                    {
                                        "category": "product_version_range",
                                        "name": "vers:arista/wifi version 2025.2.0",
                                        "product": {
                                            "name": "vers:arista/wifi version 2025.2.0",
                                            "product_id": "CSAFPID-9531075"
                                        }
                                    },
                                    {
                                        "category": "product_version_range",
                                        "name": "vers:arista/wifi version 2026.2.1",
                                        "product": {
                                            "name": "vers:arista/wifi version 2026.2.1",
                                            "product_id": "CSAFPID-9531057"
                                        }
                                    }
                                ],
                                "category": "product_name",
                                "name": "WiFi"
                            }
                        ],
                        "category": "product_family",
                        "name": "Software Products"
                    }
                ],
                "category": "vendor",
                "name": "Arista Networks"
            }
        ]
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2026-101156",
            "cwe": {
                "id": "CWE-79",
                "name": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"
            },
            "notes": [
                {
                    "category": "description",
                    "text": "No indicators of compromise exist for both issues.",
                    "title": "arista - https://www.arista.com/en/support/advisories-notices/security-advisory/24808-security-advisory-0192"
                },
                {
                    "category": "description",
                    "text": "A stored cross-site scripting (XSS) vulnerability may allow an authenticated, high-privilege administrator to store malicious content in a configuration. The content may execute in another authenticated user's browser when that user views or compares the affected configuration. Successful exploitation may allow the attacker to act through the victim's authenticated browser session to access sensitive data, modify configurations, or disrupt managed wireless services.",
                    "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-101156"
                },
                {
                    "category": "description",
                    "text": "A stored cross-site scripting (XSS) vulnerability may allow an authenticated, high-privilege administrator to store malicious content in a configuration. The content may execute in another authenticated user's browser when that user views or compares the affected configuration. Successful exploitation may allow the attacker to act through the victim's authenticated browser session to access sensitive data, modify configurations, or disrupt managed wireless services.",
                    "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-101156"
                },
                {
                    "category": "description",
                    "text": "A stored cross-site scripting (XSS) vulnerability may allow an authenticated, high-privilege administrator to store malicious content in a configuration. The content may execute in another authenticated user's browser when that user views or compares the affected configuration. Successful exploitation may allow the attacker to act through the victim's authenticated browser session to access sensitive data, modify configurations, or disrupt managed wireless services.\n#### CVE-2026-101156 and CVE-2026-101157\n\nTo be vulnerable to CVE-2026-101156 and CVE-2026-101157, CV-CUE UI must be enabled and running. The status can be audited with the command \"`cvpi status aware`\". Here is an example output of that command that indicates the system is vulnerable:\n\n```\n[root@]# cvpi status aware \nExecuting command. This may take some time... \nCompleted 1/1 discovered actions \nprimary components total:1 running:1 disabled:0 \nsecondary components total:1 running:1 disabled:0 \ntertiary components total:1 running:1 disabled:0\n  \n```",
                    "title": "arista - https://www.arista.com/assets/data/SecurityAdvisories/CSAF/arista_networks_security_advisory_192_CSAF.json"
                },
                {
                    "category": "other",
                    "text": "0.0029",
                    "title": "EPSS"
                },
                {
                    "category": "other",
                    "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H",
                    "title": "CVSSV4"
                },
                {
                    "category": "other",
                    "text": "6.2",
                    "title": "CVSSV4 base score"
                },
                {
                    "category": "other",
                    "text": "4.9",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "VENDOR FIX as product remediation category, Is related to an uncommon cwe source, Is related to an uncommon product source",
                    "title": "NCSC Score top increasing factors"
                },
                {
                    "category": "other",
                    "text": "Is related to (a version of) an uncommon product, The CVSS vector string contains A:H (Availability Impact: High), The CVSS vector string contains AV:N (Attack Vector: Network), Is related to CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')), There is cwe data available from source Nvd",
                    "title": "NCSC Score top decreasing factors"
                }
            ],
            "product_status": {
                "first_affected": [
                    "CSAFPID-9531075"
                ],
                "fixed": [
                    "CSAFPID-9531057"
                ],
                "known_affected": [
                    "CSAFPID-9530457"
                ]
            },
            "references": [
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss"
                },
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-101156"
                },
                {
                    "category": "external",
                    "summary": "Source - ncscclear",
                    "url": "https://vulnerabilities.ncsc.nl/manual/CVE-2026-101156"
                },
                {
                    "category": "external",
                    "summary": "Source - cveprojectv5",
                    "url": "https://www.cve.org/CVERecord?id=CVE-2026-101156"
                },
                {
                    "category": "external",
                    "summary": "Source - arista",
                    "url": "https://www.arista.com/en/support/advisories-notices/security-advisory/24808-security-advisory-0192"
                },
                {
                    "category": "external",
                    "summary": "Source - arista",
                    "url": "https://www.arista.com/assets/data/SecurityAdvisories/CSAF/arista_networks_security_advisory_192_CSAF.json"
                },
                {
                    "category": "external",
                    "summary": "Reference - arista; cveprojectv5; nvd",
                    "url": "https://www.arista.com/en/support/advisories-notices/security-advisory/24808-security-advisory-0192"
                },
                {
                    "category": "external",
                    "summary": "Reference - arista",
                    "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-101156"
                }
            ],
            "remediations": [
                {
                    "category": "vendor_fix",
                    "details": "Fixed in WiFi version 2026.2.1",
                    "product_ids": [
                        "CSAFPID-9531057"
                    ]
                },
                {
                    "category": "none_available",
                    "details": "Not fixed in WiFi version 2025.2.0",
                    "product_ids": [
                        "CSAFPID-9531075"
                    ]
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H",
                        "baseScore": 8.4,
                        "baseSeverity": "HIGH"
                    },
                    "products": [
                        "CSAFPID-9530457",
                        "CSAFPID-9531075"
                    ]
                }
            ],
            "title": "CVE-2026-101156"
        }
    ]
}