CVE-2019-25600
MEDIUM
NVD
CVSS Score
6.5
Severity
MEDIUM
Published
Mar 22, 2026
Vendor
unknown
Description
UltraVNC Viewer 1.2.2.4 contains a denial of service vulnerability that allows attackers to crash the application by supplying an oversized string to the VNC Server input field. Attackers can paste a malicious string containing 256 repeated characters into the VNC Server field and click Connect to trigger a buffer overflow that crashes the viewer.