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

published September 17, 2021

CVSS
—
EPSS
1%
Percentile
61.0
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00956 · 61.0th percentile
Published
2021-09-17T19:14Z
EPSS history
Timeline
  • 17 SEP 19:14Z
    RealVNC Viewer 6.21.406 allows remote VNC servers to cause a denial of service (application crash) via crafted RFB protocol data
    cvelistv5