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Rustdesk CVE-2026-30784

HIGH
Missing Authentication for Critical Function (CWE-306)
2026-03-05 2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe
Authentication Bypass Rustdesk Suse Rustdesk Server
8.8
CVSS 4.0 · NVD
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Attack ChainAIDerived

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

  1. Access
    Send unauthenticated request to hbbs/hbbr
  2. Delivery
    Invoke handle_punch_hole_request or RegisterPeer handler
  3. Exploit
    Bypass authorization checks
  4. Execution
    Modify relay forwarding or peer registration
  5. Impact
    Achieve privilege abuse

Vulnerability Assessment

Weakness
CWE
CWE-306
OWASP Top 10:2025
A07:2021 - Identification and Authentication Failures
ASVS 5.0
V2 - Authentication Authentication mechanism strength, credential management
MITRE ATT&CK

1 technique across 1 tactic: Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Exploitation Conditions

RustDesk Server versions through 1.7.5 (hbbs) or 1.1.15 (hbbr) with rendezvous/relay server modules exposed on network. No authentication required; default deployment enables vulnerable punch-hole and peer registration handlers.
Exploit ScenarioDerived

An attacker could exploit this vulnerability to compromise the affected system.
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Unauthenticated attackers can abuse missing authorization controls in RustDesk Server's rendezvous and relay modules (hbbs/hbbr) to gain unauthorized privileges through exposed critical functions like punch hole requests and peer registration. This vulnerability affects RustDesk Server versions through 1.7.5 and 1.1.15, enabling remote privilege escalation over the network with no authentication required. No patch is currently available.

Earlier versions of this analysis (1)
v1 Mar 12, 2026 - 22:06 CVSS 8.8

Missing Authorization, Missing Authentication for Critical Function vulnerability in rustdesk-server RustDesk Server rustdesk-server, rustdesk-server-pro on hbbs/hbbr on all server platforms (Rendezvous server (hbbs), relay server (hbbr) modules) allows Privilege Abuse.

RemediationAI

Monitor vendor advisories for a patch.

Affects your stack

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Technical ContextAI · show details

Classified as CWE-306 (Missing Authentication for Critical Function). Missing Authorization, Missing Authentication for Critical Function vulnerability in rustdesk-server RustDesk Server rustdesk-server, rustdesk-server-pro on hbbs/hbbr on all server platforms (Rendezvous server (hbbs), relay server (hbbr) modules) allows Privilege Abuse. This vulnerability is associated with program files src/rendezvous_server.Rs, src/relay_server.Rs and program routines handle_punch_hole_request(), RegisterPeer handler, relay forwarding.

This issue affects RustDesk Server: thro

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 8.8 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
SUSE 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vulnerable system: Confidentiality
None
Vulnerable system: Integrity
High
Vulnerable system: Availability
Low
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

DescriptionCVE.org

Missing Authorization, Missing Authentication for Critical Function vulnerability in rustdesk-server RustDesk Server rustdesk-server, rustdesk-server-pro on hbbs/hbbr on all server platforms (Rendezvous server (hbbs), relay server (hbbr) modules) allows Privilege Abuse. This vulnerability is associated with program files src/rendezvous_server.Rs, src/relay_server.Rs and program routines handle_punch_hole_request(), RegisterPeer handler, relay forwarding.

This issue affects RustDesk Server: through 1.7.5, through 1.1.15.

Executive ViewAI

Why It Matters

CVE-2026-30784 presents significant security risk, a missing authentication vulnerability rated CVSS 8.8. Attackers could bypass security controls to gain unauthorized access to protected resources and sensitive data. 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; (2) Enable MFA where possible; (3) Monitor authentication logs for anomalous access.

Threat Intelligence Overview

EPSS Score
0.1%
Top 69% exploitable
Data Quality
4 sources
Confidence: Medium
NVD CVE.org EPSS Vendor 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 HIGH
CISA KEV No
Public POC No
EPSS 0.1%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
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

44
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +44
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)CVE.org

cpe:2.3:a:rustdesk:rustdesk_server:*:*:*:*:oss:*:*:*
cpe:2.3:a:rustdesk:rustdesk_server:*:*:*:*:pro:*:*:*

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Same weakness CWE-306 – Missing Authentication for Critical Function

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Vendor StatusVendor

SUSE

Severity: Critical

References

Advisories & patches
ADVISORY https://vuldb.com/?id.349211 REF https://docs.google.com/document/d/e/2PACX-1vSds6jjpd38oO_yIAyd1HYtKNUuea-I-ozAPpGhYI7QgAU-QGJ7D8a4rOZVj1vmiUXV1EcdRHf9aZAW/pub REF https://rustdesk.com/docs/en/self-host/ REF https://www.vulsec.org/

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