CVE-2026-30794
Received Received - Intake
Improper Certificate Validation in RustDesk Client Enables MiTM Attack

Publication date: 2026-03-05

Last updated on: 2026-03-25

Assigner: VULSec Labs

Description
Improper Certificate Validation vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android (HTTP API client, TLS transport modules) allows Adversary in the Middle (AiTM). This vulnerability is associated with program files src/hbbs_http/http_client.Rs and program routines TLS retry with danger_accept_invalid_certs(true). This issue affects RustDesk Client: through 1.4.5.
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Meta Information
Published
2026-03-05
Last Modified
2026-03-25
Generated
2026-06-16
AI Q&A
2026-03-05
EPSS Evaluated
2026-06-14
NVD
CVE-2026-30794
EUVD
EUVD-2026-9828
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
rustdesk rustdesk to 1.4.5 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-295 The product does not validate, or incorrectly validates, a certificate.
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Executive Summary

This vulnerability is an Improper Certificate Validation issue in the RustDesk Client (rustdesk-client) across multiple platforms including Windows, MacOS, Linux, iOS, and Android. It affects the HTTP API client and TLS transport modules. Due to improper validation of TLS certificates, an adversary can perform a Man-in-the-Middle (MitM) attack, intercepting or altering communications between the client and server.

The problem is linked to specific program files and routines where the client retries TLS connections with a setting that dangerously accepts invalid certificates (danger_accept_invalid_certs(true)). This allows attackers to bypass normal certificate checks.

Impact Analysis

This vulnerability can have severe impacts because it allows an attacker to intercept and potentially manipulate the data transmitted between the RustDesk client and its server. Since the TLS certificate validation is improperly handled, attackers can impersonate the server or intercept sensitive information.

  • Compromise of confidentiality: sensitive data such as credentials or session information could be exposed.
  • Integrity risks: data could be altered in transit without detection.
  • Potential unauthorized access or control over remote desktop sessions.

Overall, this vulnerability poses a high risk to users relying on RustDesk for secure remote desktop connections.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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