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 contain a vulnerability where the server does not enforce the authorized connection scope of a session. This allows a peer with 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 system.
AI Analysis
Technical Summary
RustDesk before version 1.4.9 fails to enforce session scope restrictions on the server side. Specifically, peers granted limited session types can bypass these restrictions and send control messages reserved for full Remote sessions. This missing scope check (CWE-862) enables an authenticated remote peer to inject unauthorized control messages, thereby escalating their privileges to observe and control the host beyond their intended permissions.
Potential Impact
An attacker with authenticated access and a limited session type can escalate their privileges to perform unauthorized actions on the host system, including full remote control. This leads to a high impact on confidentiality and integrity, and a low impact on availability, as indicated by the CVSS score of 8.3 (High).
Mitigation Recommendations
A fix is available in RustDesk version 1.4.9 that enforces session authorized connection scopes on the server side. Users should upgrade to version 1.4.9 or later to remediate this vulnerability. No other mitigation guidance is provided or necessary as the issue is resolved by this update.
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 contain a vulnerability where the server does not enforce the authorized connection scope of a session. This allows a peer with 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 system.
CVSS v3.1
Score 8.3high
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 granted limited session types can bypass these restrictions and send control messages reserved for full Remote sessions. This missing scope check (CWE-862) enables an authenticated remote peer to inject unauthorized control messages, thereby escalating their privileges to observe and control the host beyond their intended permissions.
Potential Impact
An attacker with authenticated access and a limited session type can escalate their privileges to perform unauthorized actions on the host system, including full remote control. This leads to a high impact on confidentiality and integrity, and a low impact on availability, as indicated by the CVSS score of 8.3 (High).
Mitigation Recommendations
A fix is available in RustDesk version 1.4.9 that enforces session authorized connection scopes on the server side. Users should upgrade to version 1.4.9 or later to remediate this vulnerability. No other mitigation guidance is provided or necessary as the issue is resolved by this update.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-83jc-7j6x-wvj9
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-57850"]
- Database Specific Severity
- HIGH
- Cvss Version
- 4.0
Threat ID: 6a520eac68715ace438f4a6a
Added to database: 07/11/2026, 09:36:44 UTC
Last enriched: 08/11/2026, 19:40:50 UTC
Last updated: 09/12/2026, 10:01:32 UTC
Views: 161
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