FKIE_CVE-2026-30796

Vulnerability from fkie_nvd - Published: 2026-03-05 16:16 - Updated: 2026-06-22 10:16
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
Cleartext Transmission of Sensitive Information, Insufficiently Protected Credentials vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android (Address book sync, Heartbeat sync loop modules) allows Sniffing Attacks. The client places the preset address-book password verbatim into the heartbeat sync JSON body (src/hbbs_http/sync.rs). Over an intact HTTPS session it is not exposed in transit, but it is a reusable shared secret rather than a zero-knowledge proof, so it is recovered by any party that becomes the API endpoint - under the automatic invalid-certificate TLS downgrade (CVE-2026-30794) or a re-homed/rogue API server (CVE-2026-30797) - and the leaked credential then authorizes the server-side address book. This vulnerability is associated with program files src/hbbs_http/sync.rs and program routines heartbeat sync body builder (emits preset-address-book-password). This issue affects RustDesk Client: through 1.4.8.
References
2fdefc65-d750-4b8d-96ee-6e2c0c42dbfehttps://docs.google.com/document/d/e/2PACX-1vSds6jjpd38oO_yIAyd1HYtKNUuea-I-ozAPpGhYI7QgAU-QGJ7D8a4rOZVj1vmiUXV1EcdRHf9aZAW/pubExploit, Third Party Advisory
2fdefc65-d750-4b8d-96ee-6e2c0c42dbfehttps://rustdesk.com/docs/en/Product, Vendor Advisory
2fdefc65-d750-4b8d-96ee-6e2c0c42dbfehttps://www.vulsec.org/Not Applicable
Impacted products
Vendor Product Version
rustdesk rustdesk_server *
apple macos -
linux linux_kernel -
microsoft windows -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://github.com/rustdesk/rustdesk/releases",
          "defaultStatus": "affected",
          "modules": [
            "Address book sync",
            "Heartbeat sync loop"
          ],
          "packageName": "rustdesk-client",
          "platforms": [
            "Windows",
            "MacOS",
            "Linux",
            "iOS",
            "Android"
          ],
          "product": "RustDesk Client",
          "programFiles": [
            "src/hbbs_http/sync.rs"
          ],
          "programRoutines": [
            {
              "name": "heartbeat sync body builder (emits preset-address-book-password verbatim)"
            }
          ],
          "repo": "https://github.com/rustdesk/rustdesk,https://github.com/rustdesk/hbb_common",
          "vendor": "rustdesk-client",
          "versions": [
            {
              "changes": [
                {
                  "at": "Server Pro",
                  "status": "affected"
                }
              ],
              "lessThanOrEqual": "1.4.8",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:rustdesk:rustdesk_server:*:*:*:*:pro:*:*:*",
              "matchCriteriaId": "4F6E21F9-385D-4DB4-9CD4-EDB43561D9E5",
              "versionEndIncluding": "1.7.5",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1",
              "vulnerable": false
            },
            {
              "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": "Cleartext Transmission of Sensitive Information, Insufficiently Protected Credentials vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android (Address book sync, Heartbeat sync loop modules) allows Sniffing Attacks.\n\nThe client places the preset address-book password verbatim into the heartbeat sync JSON body (src/hbbs_http/sync.rs). Over an intact HTTPS session it is not exposed in transit, but it is a reusable shared secret rather than a zero-knowledge proof, so it is recovered by any party that becomes the API endpoint - under the automatic invalid-certificate TLS downgrade (CVE-2026-30794) or a re-homed/rogue API server (CVE-2026-30797) - and the leaked credential then authorizes the server-side address book.\n\nThis vulnerability is associated with program files src/hbbs_http/sync.rs and program routines heartbeat sync body builder (emits preset-address-book-password).\n\nThis issue affects RustDesk Client: through 1.4.8."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de transmisi\u00f3n en texto claro de informaci\u00f3n sensible en rustdesk-server-pro RustDesk Server Pro rustdesk-server-pro en Windows, MacOS, Linux (M\u00f3dulos de API de sincronizaci\u00f3n de libreta de direcciones) permite ataques de sniffing. Esta vulnerabilidad est\u00e1 asociada con archivos de programa de c\u00f3digo cerrado \u2014 punto final de API que gestiona la sincronizaci\u00f3n de latidos y rutinas de programa gestor de API de latidos (acepta preset-address-book-password en texto claro).\n\nEste problema afecta a RustDesk Server Pro: hasta la 1.7.5."
    }
  ],
  "id": "CVE-2026-30796",
  "lastModified": "2026-06-22T10:16:21.950",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.9,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "HIGH",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-30796",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-17T14:31:35.721954Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-05T16:16:21.007",
  "references": [
    {
      "source": "2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://docs.google.com/document/d/e/2PACX-1vSds6jjpd38oO_yIAyd1HYtKNUuea-I-ozAPpGhYI7QgAU-QGJ7D8a4rOZVj1vmiUXV1EcdRHf9aZAW/pub"
    },
    {
      "source": "2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe",
      "tags": [
        "Product",
        "Vendor Advisory"
      ],
      "url": "https://rustdesk.com/docs/en/"
    },
    {
      "source": "2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe",
      "tags": [
        "Not Applicable"
      ],
      "url": "https://www.vulsec.org/"
    }
  ],
  "sourceIdentifier": "2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-319"
        },
        {
          "lang": "en",
          "value": "CWE-522"
        }
      ],
      "source": "2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe",
      "type": "Secondary"
    }
  ]
}


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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.

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