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CVE-2026-30792 rustdesk-client CVE debrief

The CVE-2026-30792 vulnerability is a high-severity issue (CVSS Score: 8.3) affecting RustDesk Client versions through 1.4.8 on multiple platforms including Windows, MacOS, Linux, iOS, Android, and WebClient. This vulnerability allows for Application API Message Manipulation via Man-in-the-Middle attacks, primarily due to weaknesses in the Strategy sync, HTTP API client, and config options engine modules. The issue is associated with specific program files and routines, notably src/hbbs_http/sync.Rs and hbb_common/src/config.Rs. Defenders need to assess exposure based on their use of affected RustDesk Client versions and consider immediate mitigation steps.

Vendor
rustdesk-client
Product
Unknown
CVSS
HIGH 8.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-03-05
Original CVE updated
2026-06-22
Advisory published
2026-03-05
Advisory updated
2026-06-22

Who should care

Organizations and individuals using RustDesk Client versions through 1.4.8 on Windows, MacOS, Linux, iOS, Android, and WebClient should be aware of this vulnerability. Given the high severity and potential for Man-in-the-Middle attacks, users of RustDesk Client in enterprise environments, remote work setups, and personal use cases where security is paramount need to prioritize assessment and mitigation.

Technical summary

The CVE-2026-30792 vulnerability in RustDesk Client is caused by improper handling of API messages, allowing for manipulation via Man-in-the-Middle attacks. Affected components include Strategy sync, HTTP API client, and config options engine modules, specifically in the files src/hbbs_http/sync.Rs and hbb_common/src/config.Rs. The CVSS v4.0 score is 8.3, indicating high severity. The vulnerability is categorized under CWE-345 and CWE-657.

Defensive priority

High priority due to potential for Man-in-the-Middle attacks and high CVSS score.

Recommended defensive actions

  • Inventory and assess current RustDesk Client versions in use across the organization.
  • Review and apply vendor-supported remediation or patches for RustDesk Client.
  • Implement compensating controls such as encryption and secure authentication mechanisms.
  • Monitor for suspicious activity indicative of Man-in-the-Middle attacks.
  • Review and update configuration settings to limit exposure.

Evidence notes

The primary evidence for this vulnerability comes from the NVD and CVE.org records. The vulnerability affects RustDesk Client versions through 1.4.8. Specific program files and routines impacted include src/hbbs_http/sync.Rs and hbb_common/src/config.Rs. Defenders should verify their current RustDesk Client version and review official advisories for mitigation steps.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-30792 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-30792

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-30792 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-30792

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Mitigation or vendor reference

    Unverified legacy reference

    URL: https://docs.google.com/document/d/e/2PACX-1vSds6jjpd38oO_yIAyd1HYtKNUuea-I-ozAPpGhYI7QgAU-QGJ7D8a4rOZVj1vmiUXV1EcdRHf9aZAW/pub

    2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe - Exploit, Third Party Advisory

  • Mitigation or vendor reference

    Unverified legacy reference

    URL: https://rustdesk.com/docs/en/self-host/client-configuration/advanced-settings/

    2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe - Product, Vendor Advisory

  • Source reference

    Unverified legacy reference

    URL: https://www.vulsec.org/

    2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe - Not Applicable

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.