RustDesk Client Transmits Preset Address Book Password Verbatim in Heartbeat Sync
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| rustdesk-client | RustDesk Client | affected |
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Configuration 1 [-]
| AND |
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No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Rustdesk-server-pro | Rustdesk Server Pro |
|
Vendor Solution
Transition Address Book API to SRP (Secure Remote Password)
Vendor Workaround
Avoid setting address book passwords; use account-based access only
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.465% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| 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. 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. | 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 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. |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Cleartext Transmission of Sensitive Information vulnerability in rustdesk-server-pro RustDesk Server Pro rustdesk-server-pro on Windows, MacOS, Linux (Address book sync API modules) allows Sniffing Attacks. This vulnerability is associated with program files Closed source — API endpoint handling heartbeat sync and program routines Heartbeat API handler (accepts preset-address-book-password in plaintext). This issue affects RustDesk Server Pro: through 1.7.5. | 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. |
| Title | RustDesk Server Pro API Requires Address Book Password in Plaintext for Sync Protocol | RustDesk Client Transmits Preset Address Book Password Verbatim in Heartbeat Sync |
| First Time appeared |
Rustdesk-client
Rustdesk-client rustdesk Client |
|
| Weaknesses | CWE-522 | |
| CPEs | cpe:2.3:a:rustdesk-server-pro:rustdesk_server_pro:*:*:macos:*:*:*:*:* cpe:2.3:a:rustdesk-server-pro:rustdesk_server_pro:*:*:windows:*:*:*:*:* |
cpe:2.3:a:rustdesk-client:rustdesk_client:*:*:android:*:*:*:*:* cpe:2.3:a:rustdesk-client:rustdesk_client:*:*:ios:*:*:*:*:* cpe:2.3:a:rustdesk-client:rustdesk_client:*:*:linux:*:*:*:*:* cpe:2.3:a:rustdesk-client:rustdesk_client:*:*:macos:*:*:*:*:* cpe:2.3:a:rustdesk-client:rustdesk_client:*:*:windows:*:*:*:*:* |
| Vendors & Products |
Rustdesk-client
Rustdesk-client rustdesk Client |
|
| Metrics |
cvssV4_0
|
cvssV4_0
|
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | ||
| Vendors & Products |
Rustdesk rustdesk
|
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Apple
Apple macos Linux Linux linux Kernel Microsoft Microsoft windows Rustdesk Rustdesk rustdesk Rustdesk rustdesk Server |
|
| CPEs | cpe:2.3:a:rustdesk:rustdesk:*:*:*:*:webclient:*:*:* cpe:2.3:a:rustdesk:rustdesk_server:*:*:*:*:pro:*:*:* cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* |
|
| Vendors & Products |
Apple
Apple macos Linux Linux linux Kernel Microsoft Microsoft windows Rustdesk Rustdesk rustdesk Rustdesk rustdesk Server |
|
| Metrics |
cvssV3_1
|
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Cleartext Transmission of Sensitive Information vulnerability in rustdesk-server-pro RustDesk Server Pro rustdesk-server-pro on Windows, MacOS, Linux (Address book sync API modules) allows Sniffing Attacks. This vulnerability is associated with program files Closed source — API endpoint handling heartbeat sync and program routines Heartbeat API handler (accepts preset-address-book-password in plaintext). This issue affects RustDesk Server Pro: through 1.7.5. | |
| Title | RustDesk Server Pro API Requires Address Book Password in Plaintext for Sync Protocol | |
| First Time appeared |
Rustdesk-server-pro
Rustdesk-server-pro rustdesk Server Pro |
|
| Weaknesses | CWE-319 | |
| CPEs | cpe:2.3:a:rustdesk-server-pro:rustdesk_server_pro:*:*:linux:*:*:*:*:* cpe:2.3:a:rustdesk-server-pro:rustdesk_server_pro:*:*:macos:*:*:*:*:* cpe:2.3:a:rustdesk-server-pro:rustdesk_server_pro:*:*:windows:*:*:*:*:* |
|
| Vendors & Products |
Rustdesk-server-pro
Rustdesk-server-pro rustdesk Server Pro |
|
| References |
| |
| Metrics |
cvssV4_0
|