CVE-2020-37133
High
Description
UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in the Repeater Host configuration field that allows attackers to crash the application. Attackers can paste an overly long string of 300 characters into the Repeater Host property to trigger an application crash.
SeverityHigh
CVSS7.5
Exploit probability—
ProductUvnc Ultravnc
PublishedFeb 5, 2026
First seenFeb 5, 2026
Weakness typeCWE-121CWE-121
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| uvnc ultravnc | v ≤ 1.2.4.0 | — |
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