CVE-2026-27846 (GCVE-0-2026-27846)

Vulnerability from cvelistv5 – Published: 2026-02-25 15:03 – Updated: 2026-02-25 18:36
VLAI
Title
Missing authentication in Linksys MR9600, Linksys MX4200
Summary
Due to missing authentication, a user with physical access to the device can misuse the mesh functionality for adding a new mesh device to the network  to gain access to sensitive information, including the password for admin access to the web interface and the Wi-Fi passwords.This issue affects MR9600: 1.0.4.205530; MX4200: 1.0.13.210200.
Severity
6.2 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-25 18:35 UTC
CWE
  • CWE-306 - Missing Authentication for Critical Function
Assigner
ENISA CNA under the ENISA root
CNA scorecard B 80/100 over 40 records in the last 180 days details
References
URL Tags
https://www.syss.de/fileadmin/dokumente/Publikati… third-party-advisorytechnical-description
Impacted products
Vendor Product Version CPE status
Linksys MR9600 Affected: 1.0.4.205530
guessed Create a notification for this product.
Linksys MX4200 Affected: 1.0.13.210200
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "NONE",
              "baseScore": 6.2,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-27846",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-25T18:35:57.582373Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-25T18:36:03.925Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "MR9600",
          "vendor": "Linksys",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.4.205530"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "MX4200",
          "vendor": "Linksys",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.13.210200"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Due to missing authentication, a user with physical access to the device can misuse the mesh functionality for adding a new mesh device to the network\u0026nbsp;\u003cbr\u003eto gain access to sensitive information, including the password for admin access to the web interface and the Wi-Fi passwords.\u003cp\u003eThis issue affects MR9600: 1.0.4.205530; MX4200: 1.0.13.210200.\u003c/p\u003e"
            }
          ],
          "value": "Due to missing authentication, a user with physical access to the device can misuse the mesh functionality for adding a new mesh device to the network\u00a0\nto gain access to sensitive information, including the password for admin access to the web interface and the Wi-Fi passwords.This issue affects MR9600: 1.0.4.205530; MX4200: 1.0.13.210200."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-37",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-37 Retrieve Embedded Sensitive Data"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "CWE-306 Missing Authentication for Critical Function",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-25T15:03:58.616Z",
        "orgId": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
        "shortName": "ENISA"
      },
      "references": [
        {
          "tags": [
            "third-party-advisory",
            "technical-description"
          ],
          "url": "https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2025-002.txt"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Missing authentication in Linksys MR9600, Linksys MX4200",
      "x_generator": {
        "engine": "Vulnogram 0.5.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
    "assignerShortName": "ENISA",
    "cveId": "CVE-2026-27846",
    "datePublished": "2026-02-25T15:03:58.616Z",
    "dateReserved": "2026-02-24T07:07:48.973Z",
    "dateUpdated": "2026-02-25T18:36:03.925Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-27846",
      "date": "2026-10-14",
      "epss": "0.00209",
      "percentile": "0.10244"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "affected",
                "product": "MR9600",
                "vendor": "Linksys",
                "versions": [
                  {
                    "status": "affected",
                    "version": "1.0.4.205530"
                  }
                ]
              },
              {
                "defaultStatus": "unaffected",
                "product": "MX4200",
                "vendor": "Linksys",
                "versions": [
                  {
                    "status": "affected",
                    "version": "1.0.13.210200"
                  }
                ]
              }
            ],
            "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Due to missing authentication, a user with physical access to the device can misuse the mesh functionality for adding a new mesh device to the network\u00a0\nto gain access to sensitive information, including the password for admin access to the web interface and the Wi-Fi passwords.This issue affects MR9600: 1.0.4.205530; MX4200: 1.0.13.210200."
          },
          {
            "lang": "es",
            "value": "Debido a la falta de autenticaci\u00f3n, un usuario con acceso f\u00edsico al dispositivo puede hacer un uso indebido de la funcionalidad de malla para a\u00f1adir un nuevo dispositivo de malla a la red para obtener acceso a informaci\u00f3n sensible, incluyendo la contrase\u00f1a para el acceso de administrador a la interfaz web y las contrase\u00f1as de Wi-Fi. Este problema afecta a MR9600: 1.0.4.205530; MX4200: 1.0.13.210200."
          }
        ],
        "id": "CVE-2026-27846",
        "lastModified": "2026-06-17T10:27:46.950",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "NONE",
                "baseScore": 6.2,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.5,
              "impactScore": 3.6,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-27846",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-25T18:35:57.582373Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-02-25T16:23:28.710",
        "references": [
          {
            "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
            "url": "https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2025-002.txt"
          }
        ],
        "sourceIdentifier": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-306"
              }
            ],
            "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-03-27T07:53:21+00:00",
      "cve": "CVE-2026-27846",
      "id": "CVE-2026-27846",
      "initial_release_date": "2026-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Missing authentication in Linksys MR9600, Linksys MX4200",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27846.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.