CVE-2026-30796: CWE-522 Insufficiently Protected Credentials in rustdesk-client RustDesk Client
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.
AI Analysis
Technical Summary
RustDesk Client versions up to 1.4.8 contain an insufficiently protected credentials vulnerability (CWE-522) where the preset address-book password is embedded in the heartbeat sync JSON payload. While HTTPS protects the password in transit, the password is a reusable shared secret rather than a zero-knowledge proof. Therefore, if an attacker controls or re-homes the API server endpoint, they can recover this password and gain unauthorized access to the address book data. The vulnerability is located in the source file src/hbbs_http/sync.rs within the heartbeat sync body builder routine.
Potential Impact
An attacker who gains control of the API endpoint can recover the preset address-book password from the heartbeat sync JSON body and use it to access the address book on the server side. This compromises the confidentiality of address book data. The vulnerability does not expose credentials in transit due to HTTPS but relies on the trustworthiness of the API endpoint. There are no known exploits in the wild as of the publication date.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid using untrusted or re-homed API servers to prevent credential exposure. Monitor vendor communications for updates regarding an official fix or mitigation.
CVE-2026-30796: CWE-522 Insufficiently Protected Credentials in rustdesk-client RustDesk Client
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 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.
CVSS v4.0
Score 6.9medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
RustDesk Client versions up to 1.4.8 contain an insufficiently protected credentials vulnerability (CWE-522) where the preset address-book password is embedded in the heartbeat sync JSON payload. While HTTPS protects the password in transit, the password is a reusable shared secret rather than a zero-knowledge proof. Therefore, if an attacker controls or re-homes the API server endpoint, they can recover this password and gain unauthorized access to the address book data. The vulnerability is located in the source file src/hbbs_http/sync.rs within the heartbeat sync body builder routine.
Potential Impact
An attacker who gains control of the API endpoint can recover the preset address-book password from the heartbeat sync JSON body and use it to access the address book on the server side. This compromises the confidentiality of address book data. The vulnerability does not expose credentials in transit due to HTTPS but relies on the trustworthiness of the API endpoint. There are no known exploits in the wild as of the publication date.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid using untrusted or re-homed API servers to prevent credential exposure. Monitor vendor communications for updates regarding an official fix or mitigation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VULSec
- Date Reserved
- 2026-03-05T14:13:37.203Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69a9c05f460e1c85df0c5c57
Added to database: 03/05/2026, 17:41:51 UTC
Last enriched: 07/19/2026, 17:37:57 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 196
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