FKIE_CVE-2025-44016

Vulnerability from fkie_nvd - Published: 2025-12-11 12:16 - Updated: 2026-06-17 09:24
Severity
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
A vulnerability in TeamViewer DEX Client (former 1E client) - Content Distribution Service (NomadBranch.exe) prior version 25.11 for Windows allows malicious actors to bypass file integrity validation via a crafted request. By providing a valid hash for a malicious file, an attacker can cause the service to incorrectly validate and process the file as trusted, enabling arbitrary code execution under the Nomad Branch service context.
References
psirt@teamviewer.comhttps://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2025-1005/Vendor Advisory
Impacted products
Vendor Product Version
teamviewer digital_employee_experience *
microsoft windows -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "Content Distribution Service",
            "NomadBranch.exe"
          ],
          "platforms": [
            "Windows"
          ],
          "product": "DEX",
          "vendor": "TeamViewer",
          "versions": [
            {
              "lessThan": "25.11.0.29",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "changes": [
                {
                  "at": "HF-PLTPKG-524",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "25.9.0.46",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "changes": [
                {
                  "at": "HF-PLTPKG-526",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "25.5.0.53",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "changes": [
                {
                  "at": "HF-PLTPKG-525",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "24.5.0.69",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "psirt@teamviewer.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:teamviewer:digital_employee_experience:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8611FFE2-869F-435C-8FC2-8522C656D4EA",
              "versionEndExcluding": "25.11",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in TeamViewer DEX Client (former 1E client) - Content Distribution Service (NomadBranch.exe) prior version 25.11 for Windows allows malicious actors to bypass file integrity validation via a crafted request. By providing a valid hash for a malicious file, an attacker can cause the service to incorrectly validate and process the file as trusted, enabling arbitrary code execution under the Nomad Branch service context."
    }
  ],
  "id": "CVE-2025-44016",
  "lastModified": "2026-06-17T09:24:55.450",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "psirt@teamviewer.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-44016",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-12-11T17:20:04.181566Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-12-11T12:16:25.137",
  "references": [
    {
      "source": "psirt@teamviewer.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2025-1005/"
    }
  ],
  "sourceIdentifier": "psirt@teamviewer.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "psirt@teamviewer.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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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

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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.


Detection rules are retrieved from Rulezet.