CVE-2026-30790 (GCVE-0-2026-30790)

Vulnerability from cvelistv5 – Published: 2026-03-05 15:49 – Updated: 2026-06-22 07:55
VLAI
Title
RustDesk Server Controls All Handshake Entropy (Salt/Challenge), Enabling Offline Brute-Force
Summary
Use of Password Hash With Insufficient Computational Effort, Cleartext Transmission of Sensitive Information vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android (Server Pro /api login over the HTTP management channel) allows Interception (aka Sniffing) followed by offline Password Brute Forcing. The controlled-host peer authentication channel is NOT affected: Client::secure_connection verifies the HBBS-signed host public key and negotiates an XSalsa20-Poly1305 secretbox session before the login proof is sent, so passive capture and relay man-in-the-middle do not expose it (capture-replay / CWE-294 withdrawn). On the Server Pro /api login path the proof is protected by TLS alone, is exposed under the automatic invalid-certificate downgrade (CVE-2026-30794), and is recoverable offline because it is a fast double SHA256 over a server-controlled salt and challenge with no slow KDF. This vulnerability is associated with program files src/client.rs and src/common.rs and program routines handle_hash(), handle_login_from_ui() (login proof construction) and post_request_() (API transport). This issue affects RustDesk Client: through 1.4.8.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-307 - Improper Restriction of Excessive Authentication Attempts
  • CWE-916 - Use of Password Hash With Insufficient Computational Effort
Assigner
References
URL Tags
https://github.com/rustdesk product
https://docs.google.com/document/d/e/2PACX-1vSds6… third-party-advisoryexploit
https://www.vulsec.org/ vdb-entrythird-party-advisory
Impacted products
Date Public
2026-03-05 13:45
Credits
Erez Kalman Erez Kalman
Show details on NVD website
To clipboard 

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Deploy rate-limiting (e.g., fail2ban on OSS 1.1.15+).\", \"base64\": false}]}], \"x_generator\": {\"engine\": \"Vulnogram 0.5.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Improper Restriction of Excessive Authentication Attempts, Use of Password Hash With Insufficient Computational Effort vulnerability in rustdesk-server-pro RustDesk Server Pro rustdesk-server-pro on Windows, MacOS, Linux (Peer authentication, API login modules), rustdesk-server RustDesk Server (OSS) rustdesk-server on Windows, MacOS, Linux (Peer authentication, API login modules) allows Password Brute Forcing. This vulnerability is associated with program files src/server/connection.Rs and program routines Salt/challenge generation, SHA256(SHA256(pwd+salt)+challenge) verification.\\n\\nThis issue affects RustDesk Server Pro: through 1.7.5; RustDesk Server (OSS): through 1.1.15.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Improper Restriction of Excessive Authentication Attempts, Use of Password Hash With Insufficient Computational Effort vulnerability in rustdesk-server-pro RustDesk Server Pro rustdesk-server-pro on Windows, MacOS, Linux (Peer authentication, API login modules), rustdesk-server RustDesk Server (OSS) rustdesk-server on Windows, MacOS, Linux (Peer authentication, API login modules) allows Password Brute Forcing.\u003cp\u003e This vulnerability is associated with program files \u003ctt\u003esrc/server/connection.Rs\u003c/tt\u003e and program routines \u003ctt\u003eSalt/challenge generation\u003c/tt\u003e, \u003ctt\u003eSHA256(SHA256(pwd+salt)+challenge) verification\u003c/tt\u003e.\u003c/p\u003e\u003cp\u003eThis issue affects RustDesk Server Pro: through 1.7.5; RustDesk Server (OSS): through 1.1.15.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-307\", \"description\": \"CWE-307 Improper Restriction of Excessive Authentication Attempts\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-916\", \"description\": \"CWE-916 Use of Password Hash With Insufficient Computational Effort\"}]}], \"configurations\": [{\"lang\": \"en\", \"value\": \"Default \\u2014 any password-based authentication\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Default \\u2014 any password-based authentication\", \"base64\": false}]}], \"providerMetadata\": {\"orgId\": \"2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe\", \"shortName\": \"VULSec\", \"dateUpdated\": \"2026-03-05T16:59:25.324Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-30790\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-10T18:26:36.250Z\", \"dateReserved\": \"2026-03-05T14:13:37.202Z\", \"assignerOrgId\": \"2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe\", \"datePublished\": \"2026-03-05T15:49:15.539Z\", \"assignerShortName\": \"VULSec\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.