{"api_version":"1","generated_at":"2026-06-22T20:26:02+00:00","cve":"CVE-2026-30796","urls":{"html":"https://cve.report/CVE-2026-30796","api":"https://cve.report/api/cve/CVE-2026-30796.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-30796","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-30796"},"summary":{"title":"RustDesk Client Transmits Preset Address Book Password Verbatim in Heartbeat Sync","description":"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.","state":"PUBLISHED","assigner":"VULSec","published_at":"2026-03-05 16:16:21","updated_at":"2026-06-22 14:17:35"},"problem_types":["CWE-522","CWE-522 CWE-522 Insufficiently Protected Credentials"],"metrics":[{"version":"4.0","source":"2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe","type":"Secondary","score":"6.9","severity":"MEDIUM","vector":"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","data":{"version":"4.0","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","baseScore":6.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}},{"version":"4.0","source":"CNA","type":"CVSS","score":"6.9","severity":"MEDIUM","vector":"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","data":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","exploitMaturity":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"}},{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"}}],"references":[{"url":"https://docs.google.com/document/d/e/2PACX-1vSds6jjpd38oO_yIAyd1HYtKNUuea-I-ozAPpGhYI7QgAU-QGJ7D8a4rOZVj1vmiUXV1EcdRHf9aZAW/pub","name":"https://docs.google.com/document/d/e/2PACX-1vSds6jjpd38oO_yIAyd1HYtKNUuea-I-ozAPpGhYI7QgAU-QGJ7D8a4rOZVj1vmiUXV1EcdRHf9aZAW/pub","refsource":"2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe","tags":["Exploit","Third Party Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.vulsec.org/","name":"https://www.vulsec.org/","refsource":"2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe","tags":["Not Applicable"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://rustdesk.com/docs/en/","name":"https://rustdesk.com/docs/en/","refsource":"2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe","tags":["Product","Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-30796","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-30796","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"rustdesk-client","product":"RustDesk Client","version":"affected 1.4.8 custom","platforms":["Windows","MacOS","Linux","iOS","Android"]}],"timeline":[],"solutions":[{"source":"CNA","title":"","value":"Transition Address Book API to SRP (Secure Remote Password)","time":"","lang":"en"}],"workarounds":[{"source":"CNA","title":"","value":"Avoid setting address book passwords; use account-based access only","time":"","lang":"en"}],"exploits":[{"source":"CNA","title":"","value":"PoC available. Trivially exploitable.","time":"","lang":"en"}],"credits":[{"source":"CNA","value":"Erez Kalman","lang":"en"},{"source":"CNA","value":"Erez Kalman","lang":"en"}],"nvd_cpes":[{"cve_year":"2026","cve_id":"30796","vulnerable":"0","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"apple","cpe5":"macos","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2026","cve_id":"30796","vulnerable":"0","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2026","cve_id":"30796","vulnerable":"0","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2026","cve_id":"30796","vulnerable":"1","versionEndIncluding":"1.7.5","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"rustdesk","cpe5":"rustdesk_server","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"pro","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-30796","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-03-17T14:31:35.721954Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-03-17T14:31:39.098Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"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"}]}],"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Client with a preset address book password configured"}],"value":"Client with a preset address book password configured"}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:rustdesk-client:rustdesk_client:*:*:windows:*:*:*:*:*","versionEndIncluding":"1.4.8","versionStartIncluding":"0","vulnerable":true},{"criteria":"cpe:2.3:a:rustdesk-client:rustdesk_client:*:*:macos:*:*:*:*:*","versionEndIncluding":"1.4.8","versionStartIncluding":"0","vulnerable":true},{"criteria":"cpe:2.3:a:rustdesk-client:rustdesk_client:*:*:linux:*:*:*:*:*","versionEndIncluding":"1.4.8","versionStartIncluding":"0","vulnerable":true},{"criteria":"cpe:2.3:a:rustdesk-client:rustdesk_client:*:*:ios:*:*:*:*:*","versionEndIncluding":"1.4.8","versionStartIncluding":"0","vulnerable":true},{"criteria":"cpe:2.3:a:rustdesk-client:rustdesk_client:*:*:android:*:*:*:*:*","versionEndIncluding":"1.4.8","versionStartIncluding":"0","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"OR"}],"credits":[{"lang":"en","type":"finder","value":"Erez Kalman"},{"lang":"en","type":"reporter","value":"Erez Kalman"}],"datePublic":"2026-03-05T13:45:00.000Z","descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","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.<br><br>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.<br><br>This vulnerability is associated with program files src/hbbs_http/sync.rs and program routines heartbeat sync body builder (emits preset-address-book-password).<br><br>This issue affects RustDesk Client: through 1.4.8."}],"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."}],"exploits":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"PoC available. Trivially exploitable.<br>"}],"value":"PoC available. Trivially exploitable."}],"impacts":[{"capecId":"CAPEC-157","descriptions":[{"lang":"en","value":"CAPEC-157 Sniffing Attacks"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","exploitMaturity":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-522","description":"CWE-522 Insufficiently Protected Credentials","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-06-22T13:17:31.551Z","orgId":"2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe","shortName":"VULSec"},"references":[{"tags":["technical-description","x_--config documentation"],"url":"https://rustdesk.com/docs/en/"},{"tags":["third-party-advisory","exploit"],"url":"https://docs.google.com/document/d/e/2PACX-1vSds6jjpd38oO_yIAyd1HYtKNUuea-I-ozAPpGhYI7QgAU-QGJ7D8a4rOZVj1vmiUXV1EcdRHf9aZAW/pub"},{"tags":["vdb-entry","third-party-advisory"],"url":"https://www.vulsec.org/"}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Transition Address Book API to SRP (Secure Remote Password)"}],"value":"Transition Address Book API to SRP (Secure Remote Password)"}],"source":{"discovery":"UNKNOWN"},"title":"RustDesk Client Transmits Preset Address Book Password Verbatim in Heartbeat Sync","workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Avoid setting address book passwords; use account-based access only"}],"value":"Avoid setting address book passwords; use account-based access only"}],"x_generator":{"engine":"Vulnogram 0.5.0"}}},"cveMetadata":{"assignerOrgId":"2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe","assignerShortName":"VULSec","cveId":"CVE-2026-30796","datePublished":"2026-03-05T15:30:39.605Z","dateReserved":"2026-03-05T14:13:37.203Z","dateUpdated":"2026-06-22T13:17:31.551Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-03-05 16:16:21","lastModifiedDate":"2026-06-22 14:17:35","problem_types":["CWE-522","CWE-522 CWE-522 Insufficiently Protected Credentials"],"metrics":{"cvssMetricV40":[{"source":"2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe","type":"Secondary","cvssData":{"version":"4.0","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","baseScore":6.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-03-17T14:31:35.721954Z","id":"CVE-2026-30796","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"operator":"AND","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:rustdesk:rustdesk_server:*:*:*:*:pro:*:*:*","versionEndIncluding":"1.7.5","matchCriteriaId":"4F6E21F9-385D-4DB4-9CD4-EDB43561D9E5"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"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"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"30796","Ordinal":"1","Title":"RustDesk Client Transmits Preset Address Book Password Verbatim ","CVE":"CVE-2026-30796","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"30796","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"RustDesk Client Transmits Preset Address Book Password Verbatim "}]}}}