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CVE-2026-30796— RustDesk Client Transmits Preset Address Book Password Verbatim in Heartbeat Sync

Quick assessment

Affected
rustdesk-client RustDesk Client
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

RustDesk Server PRO是RustDesk个人开发者的一个远程桌面服务器管理脚本集。 RustDesk Server PRO 1.7.5及之前版本存在安全漏洞，该漏洞源于敏感信息明文传输，可能导致嗅探攻击。

AI Predicted 5.3 Difficulty: Easy EPSS 0.51% · P41

Affected Version Matrix 1

VendorProduct Version RangeStatus
rustdesk-client RustDesk Client ≤ 1.4.8 affected
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I. Basic Information for CVE-2026-30796

Vulnerability Information
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Vulnerability Title
RustDesk Client Transmits Preset Address Book Password Verbatim in Heartbeat Sync
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的凭证保护机制
Source: CVE Program / CVE List V5
Vulnerability Title
RustDesk Server PRO 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RustDesk Server PRO是RustDesk个人开发者的一个远程桌面服务器管理脚本集。 RustDesk Server PRO 1.7.5及之前版本存在安全漏洞，该漏洞源于敏感信息明文传输，可能导致嗅探攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
rustdesk-client RustDesk Client 0 ~ 1.4.8 -

II. Public POCs for CVE-2026-30796

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III. Intelligence Information for CVE-2026-30796

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Proof of Concept for CVE-2026-30796 (1)

Security Blog Posts for CVE-2026-30796 (1)

Vendor Pages for CVE-2026-30796 (1)

Same Patch Batch · rustdesk-client · 2026-03-05 · 10 CVEs total

CVE-2026-30791 RustDesk Client Accepts Pseudo-Encrypted Config Strings Without Cryptographic Validation
CVE-2026-30789 RustDesk Auth Proof Uses Server-Controlled Salt/Challenge and Fast Double-SHA256, Enabling
CVE-2026-30797 RustDesk rustdesk://config/ URI Silently Re-homes Client to Attacker-Controlled Server
CVE-2026-30798 RustDesk Client Accepts Unauthenticated stop-service Command via Strategy Payload
CVE-2026-30793 RustDesk Flutter URI Handler Sets Permanent Password Without Privilege Check or User Confi
CVE-2026-30792 RustDesk Client Blindly Merges Unauthenticated Strategy Payloads, Bypassing Local Security
CVE-2026-30795 RustDesk HTTP Client Silently Accepts Invalid TLS Certificates After Handshake Failure
CVE-2026-30785 RustDesk Encrypts Local Passwords with World-Readable Machine ID and Fixed Zero Nonce (XSa
CVE-2026-30783 RustDesk Client Can Orphan API Channel to Ignore All Admin Commands and ACL Policies

IV. Related Vulnerabilities

Same product: RustDesk Client
Same vendor: rustdesk-client
Same weakness: CWE-522

V. Comments for CVE-2026-30796

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