CVE-2026-30796

RustDesk Client Transmits Preset Address Book Password Verbatim in Heartbeat Sync

HIGH
7.5
CVSS Score
Published: March 5, 2026 at 03:30 PM UTC
Updated: July 19, 2026 at 12:24 PM UTC
2 products affected across 2 vendorsRustdesk ServerRustdesk· also runs on 3 platforms

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Severity
HIGH7.5
Exploit prediction
EPSS 0.5%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 1.7.5
apple-macos (environment) · linux-linux-kernel (environment) · microsoft-windows (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Technical Descriptionx_--config documentationProductVendor Advisory
Source: cverecord
https://rustdesk.com/docs/en/
VDB EntryThird Party AdvisoryNot Applicable
Source: cverecord
https://www.vulsec.org/

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-319CWE-522

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