CVE-2026-30791
Published: 05 March 2026
Summary
CVE-2026-30791 is a high-severity Use of a Broken or Risky Cryptographic Algorithm (CWE-327) vulnerability in Rustdesk Rustdesk. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Unsecured Credentials (T1552); ranked at the 6.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Contacts with security groups provide timely information on broken or risky cryptographic algorithms, reducing the likelihood of their selection and use.
Ongoing education and sharing of recommended practices helps organizations identify and migrate away from broken or risky cryptographic algorithms.
Cross-organization threat feeds commonly include advances in cryptanalysis and active exploits against weak or broken algorithms, allowing organizations to deprecate them proactively.
Capital planning and funding allow selection and ongoing support of strong cryptographic algorithms rather than weak or broken ones.
Risk updates surface newly-broken or risky cryptographic algorithms as threat intelligence and computing advances evolve, enabling timely replacement.
Scanners flag use of broken or weak cryptographic algorithms via known-vulnerability databases.
Enforces approved cryptographic algorithms for each use case, blocking use of broken or risky algorithms.
Flaw remediation replaces broken or risky cryptographic algorithms once safer implementations are released by vendors.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Broken crypto in config/URI/CLI paths directly enables remote retrieval of embedded sensitive data (credentials, keys), mapping to unsecured credential access and local data collection.
NVD Description
Use of a Broken or Risky Cryptographic Algorithm vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android, WebClient (Config import, URI scheme handler, CLI --config modules) allows Retrieve Embedded Sensitive Data. This vulnerability is associated with program…
more
files flutter/lib/common.Dart, hbb_common/src/config.Rs and program routines parseRustdeskUri(), importConfig(). This issue affects RustDesk Client: through 1.4.5.
Deeper analysisAI
CVE-2026-30791 is a Use of a Broken or Risky Cryptographic Algorithm vulnerability (CWE-327, CWE-684) in the rustdesk-client component of the RustDesk Client. It affects the client software on Windows, macOS, Linux, iOS, Android, and WebClient platforms, specifically within the Config import, URI scheme handler, and CLI --config modules. The flaw enables retrieval of embedded sensitive data and is associated with files including flutter/lib/common.dart, hbb_common/src/config.rs, and routines such as parseRustdeskUri() and importConfig(). This issue 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:H/I:N/A:N).
A remote network attacker can exploit this vulnerability with low attack complexity, requiring no privileges, authentication, or user interaction. Successful exploitation allows the attacker to retrieve highly sensitive embedded data from the client, resulting in significant confidentiality impact while leaving integrity and availability unaffected.
Mitigation details are outlined in related advisories and documentation, including the security advisory at https://docs.google.com/document/d/e/2PACX-1vSds6jjpd38oO_yIAyd1HYtKNUuea-I-ozAPpGhYI7QgAU-QGJ7D8a4rOZVj1vmiUXV1EcdRHf9aZAW/pub, RustDesk client documentation at https://rustdesk.com/docs/en/client/, and additional resources at https://www.vulsec.org/.
Details
- CWE(s)