Use of Hard-coded Credentials Affecting ultravnc/UltraVNC package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Use of Hard-coded Credentials vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-UNMANAGED-ULTRAVNCULTRAVNC-17747004
- published1 Jul 2026
- disclosed1 Jul 2026
- creditUnknown
Introduced: 1 Jul 2026
CVE-2026-7839 (opens in a new tab)How to fix?
There is no fixed version for ultravnc/UltraVNC.
Overview
Affected versions of this package are vulnerable to Use of Hard-coded Credentials in the wi_decode_auth process. An attacker can gain unauthorized administrative access by authenticating with a hardcoded default credential over HTTP, allowing full control of configuration settings, including allow/deny rules and session visibility.