CVE-2026-30794Public exploit

Invalid-certificate fallback requires explicit operator opt-in

Published Mar 5, 2026 · Updated Mar 5, 2026

RustDesk Client 1.4.5 and earlier does not automatically accept invalid TLS certificates after a handshake failure. The HTTP client's get_cached_tls_accept_invalid_cert() returns false by default, so rustls and native-tls validate the certificate and the request fails closed. Invalid-certificate acceptance occurs only after an operator enables the default-off allow-insecure-tls-fallback option; the CNA therefore rejected the vulnerability claim.

CVSS severity8.1
High
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

RustDesk Client 1.4.5 and earlier does not automatically accept invalid TLS certificates after a handshake failure. The HTTP client's get_cached_tls_accept_invalid_cert() returns false by default, so rustls and native-tls validate the certificate and the request fails closed. Invalid-certificate acceptance occurs only after an operator enables the default-off allow-insecure-tls-fallback option; the CNA therefore rejected the vulnerability claim.

The record

CVE
CVE-2026-30794
Published
Mar 5, 2026
Updated
Mar 5, 2026
Vendor
RustDesk
Product
RustDesk
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.4.5

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

RustDesk · RustDeskversion=0 <=1.4.5

Published CVSS scores

8.1NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.1VULSecCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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