What is the CVSS score of CVE-2026-30783?

CVE-2026-30783 has a CVSS 4.0 base score of 4.8 (Medium). CVSS vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. EPSS exploitation probability: 0.1%.

How to fix or mitigate CVE-2026-30783?

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

Rustdesk CVE-2026-30783

MEDIUM

Client-Side Enforcement of Server-Side Security (CWE-602)

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

Information Disclosure Google Apple Microsoft Rustdesk

4.8

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

Send unauthenticated request to RustDesk signaling server
Exploit

Exploit API sync loop in config management
Execution

Modify client configuration without authorization
Impact

Gain elevated privileges

Vulnerability Assessment

Weakness	CWE CWE-602 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V14 - Configuration Dependency management, component inventory
Exploitation Conditions	RustDesk Client versions up to 1.4.5 with network-accessible API sync loop endpoint (rendezvous_mediator.rs, hbbs_http/sync.rs). No authentication or special configuration required for default client deployments accepting remote API synchronization.
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 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Privilege escalation in RustDesk Client through version 1.4.5 on Windows, macOS, Linux, iOS, and Android allows unauthenticated remote attackers to abuse API sync and configuration management functions. The vulnerability in the rendezvous mediator and HTTP sync modules enables attackers to gain elevated privileges without user interaction. No patch is currently available for affected users.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:06 CVSS 8.8

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

A vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android, WebClient (Client signaling, API sync loop, config management modules) allows Privilege Abuse. This vulnerability is associated with program files src/rendezvous_mediator.Rs, src/hbbs_http/sync.Rs and program routines API sync loop, api-server config handling.

This issue affects RustDesk Client: through 1.4.5.

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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 4.8 MEDIUM

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/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

Local

Attack Complexity

Low

Attack Requirements

None

Privileges Required

Low

User Interaction

None

Vulnerable system: Confidentiality

None

Vulnerable system: Integrity

Low

Vulnerable system: Availability

None

Subsequent system: Confidentiality

None

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

8.8 (HIGH) 4.8 (MEDIUM)

CVE Published

Mar 05, 2026 - 16:16 nvd

HIGH 8.8

DescriptionCVE.org

This issue affects RustDesk Client: through 1.4.5.

Executive ViewAI

Why It Matters

CVE-2026-30783 presents significant security risk rated CVSS 8.8. 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

0.1%

Top 74% 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 0.1%

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

Scheduled

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +24

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.