CVE-2026-30798
Published: 05 March 2026
Summary
CVE-2026-30798 is a high-severity Insufficient Verification of Data Authenticity (CWE-345) vulnerability in Rustdesk Rustdesk. Its CVSS base score is 8.2 (High).
Operationally, ranked at the 20.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SC-5 (Denial-of-service Protection) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2026-30798 is an Insufficient Verification of Data Authenticity and Improper Handling of Exceptional Conditions vulnerability in the rustdesk-client component of the RustDesk Client. It affects the application on Windows, macOS, Linux, iOS, and Android platforms, specifically targeting the Heartbeat sync loop and strategy processing modules. The issue is tied to program files such as src/hbbs_http/sync.rs and routines in the stop-service handler within the heartbeat loop, enabling Protocol Manipulation. This vulnerability impacts RustDesk Client versions through 1.4.5 and carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), mapped to CWEs 345 and 755.
The vulnerability can be exploited by remote attackers requiring no privileges or user interaction, accessible over the network with low attack complexity. Exploitation leads to high availability impact through denial of service, such as service crashes or disruptions, while confidentiality and integrity remain unaffected.
Advisories and further details on mitigation are available in the referenced sources: https://docs.google.com/document/d/e/2PACX-1vSds6jjpd38oO_yIAyd1HYtKNUuea-I-ozAPpGhYI7QgAU-QGJ7D8a4rOZVj1vmiUXV1EcdRHf9aZAW/pub, https://rustdesk.com/docs/en/client/, and https://www.vulsec.org/.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-9838
Vulnerability details
Insufficient Verification of Data Authenticity, Improper Handling of Exceptional Conditions vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android (Heartbeat sync loop, strategy processing modules) allows Protocol Manipulation. This vulnerability is associated with program files src/hbbs_http/sync.Rs and…
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program routines stop-service handler in heartbeat loop. This issue affects RustDesk Client: through 1.4.5.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Insufficient information to map techniques.CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
SI-11 directly addresses the Improper Handling of Exceptional Conditions (CWE-755) in the heartbeat loop and stop-service handler that leads to service crashes.
SI-10 enforces validation of information inputs in the heartbeat sync loop and strategy processing modules to mitigate Insufficient Verification of Data Authenticity (CWE-345) and protocol manipulation.
SC-5 provides denial-of-service protection tailored to the high availability impact from remote exploitation causing service disruptions and crashes.