Vulnerability Details CVE-2021-41380
RealVNC Viewer 6.21.406 allows remote VNC servers to cause a denial of service (application crash) via crafted RFB protocol data. NOTE: It is asserted that this issue requires social engineering a user into connecting to a fake VNC Server. The VNC Viewer application they are using will then hang, until terminated, but no memory leak occurs - the resources are freed once the hung process is terminated and the resource usage is constant during the hang. Only the process that is connected to the fake Server is affected. This is an application bug, not a security issue
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 51.4%
CVSS Severity
CVSS v3 Score 6.5
CVSS v2 Score 4.3
References
Products affected by CVE-2021-41380
-
cpe:2.3:a:realvnc:vnc_viewer:6.21.406