RustDesk before 1.4.9 does not enforce a session's authorized connection scope on the server side, so a peer granted a limited session type… (CVE-2026-57850)
RustDesk versions prior to 1.4.9 have a vulnerability where the server does not enforce the authorized connection scope for sessions. This allows a peer granted a limited session type (such as FileTransfer, PortForward, ViewCamera, or Terminal) to send control messages and login options intended only for full Remote sessions. An authenticated remote peer can exploit this flaw to perform actions beyond their granted permissions, potentially observing and controlling the host beyond the intended scope.
AI Analysis
Technical Summary
RustDesk before version 1.4.9 fails to enforce session scope restrictions on the server side. Specifically, peers with limited session types can bypass these restrictions and send control messages reserved for full Remote sessions. This missing scope check enables an authenticated remote peer to inject unauthorized control messages, thereby escalating their privileges and gaining broader access to the host than permitted by their session type.
Potential Impact
An authenticated remote peer with a limited session type can escalate their privileges by sending unauthorized control messages and login options. This can lead to unauthorized observation and control of the host system beyond the permissions originally granted, potentially compromising the confidentiality and integrity of the host environment.
Mitigation Recommendations
A fix is available in RustDesk version 1.4.9. Users should upgrade to version 1.4.9 or later to ensure proper enforcement of session connection scopes on the server side and prevent unauthorized privilege escalation.
RustDesk before 1.4.9 does not enforce a session's authorized connection scope on the server side, so a peer granted a limited session type… (CVE-2026-57850)
Description
RustDesk versions prior to 1.4.9 have a vulnerability where the server does not enforce the authorized connection scope for sessions. This allows a peer granted a limited session type (such as FileTransfer, PortForward, ViewCamera, or Terminal) to send control messages and login options intended only for full Remote sessions. An authenticated remote peer can exploit this flaw to perform actions beyond their granted permissions, potentially observing and controlling the host beyond the intended scope.
CVSS v4.0
Affected software
pkg:cargo/github/rustdesk/rustdeskRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
RustDesk before version 1.4.9 fails to enforce session scope restrictions on the server side. Specifically, peers with limited session types can bypass these restrictions and send control messages reserved for full Remote sessions. This missing scope check enables an authenticated remote peer to inject unauthorized control messages, thereby escalating their privileges and gaining broader access to the host than permitted by their session type.
Potential Impact
An authenticated remote peer with a limited session type can escalate their privileges by sending unauthorized control messages and login options. This can lead to unauthorized observation and control of the host system beyond the permissions originally granted, potentially compromising the confidentiality and integrity of the host environment.
Mitigation Recommendations
A fix is available in RustDesk version 1.4.9. Users should upgrade to version 1.4.9 or later to ensure proper enforcement of session connection scopes on the server side and prevent unauthorized privilege escalation.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-83jc-7j6x-wvj9
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-57850"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 4.0
Threat ID: 6a520eac68715ace438f4a6a
Added to database: 07/11/2026, 09:36:44 UTC
Last enriched: 07/20/2026, 21:05:42 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 94
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