What is the CVSS score of CVE-2026-30796?

CVE-2026-30796 has a CVSS 4.0 base score of 6.9 (Medium). CVSS 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. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-30796?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

Rustdesk CVE-2026-30796

MEDIUM

Cleartext Transmission of Sensitive Information (CWE-319)

2026-03-05 2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe

Information Disclosure Apple Microsoft Rustdesk Rustdesk Server

6.9

CVSS 4.0 · Vendor: 2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Intercept network traffic to RustDesk API
Exploit

Capture plaintext heartbeat sync request
Execution

Extract preset-address-book-password credential
Impact

Authenticate to address book

Vulnerability Assessment

Weakness	CWE CWE-319 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V14 - Configuration Dependency management, component inventory
Exploitation Conditions	RustDesk Server Pro versions through 1.7.5 with Address book sync API enabled. Attacker positioned on network path to intercept HTTP traffic to heartbeat API endpoint accepting plaintext preset-address-book-password parameter.
Exploit ScenarioDerived	An attacker could exploit this vulnerability to compromise the affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

RustDesk Server Pro through version 1.7.5 transmits sensitive address book credentials in cleartext over the network heartbeat synchronization API, enabling attackers to intercept and obtain authentication credentials without authentication. The vulnerability affects Windows, macOS, and Linux deployments where the address book sync functionality is enabled. No patch is currently available.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:06 CVSS 8.7

RemediationAI

Monitor vendor advisories for a patch.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Classified as CWE-319 (Cleartext Transmission of Sensitive Information). 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.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe) PRIMARY 6.9 MEDIUM

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

Primary rating from Vendor (2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe) · only source for this CVE.

CVSS VectorVendor: 2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

Present

Privileges Required

None

User Interaction

None

Vulnerable system: Confidentiality

None

Vulnerable system: Integrity

None

Vulnerable system: Availability

None

Subsequent system: Confidentiality

High

Subsequent system: Integrity

None

Subsequent system: Availability

None

Lifecycle Timeline

Severity Changed

Jun 22, 2026 - 10:37 NVD

HIGH MEDIUM

CVSS changed

Jun 22, 2026 - 10:37 NVD

8.7 (HIGH) 6.9 (MEDIUM)

CVE Published

Mar 05, 2026 - 16:16 nvd

HIGH 8.7

DescriptionCVE.org

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.

Executive ViewAI

Why It Matters

CVE-2026-30796 presents significant security risk rated CVSS 8.7. Successful exploitation could significantly impact the confidentiality, integrity, or availability of affected systems. Organizations should apply vendor updates when available and consider compensating controls in the interim.

Business Impact: Severe

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.

Threat Intelligence Overview

EPSS Score

0.0%

Top 95% exploitable

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +34

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.