CVE-2026-3787
Uncontrolled Search Path in UltraVNC cryptbase.dll on Windows
Publication date: 2026-03-08
Last updated on: 2026-04-29
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| uvnc | ultravnc | 1.6.4.0 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-426 | The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control. |
| CWE-427 | The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in UltraVNC version 1.6.4.0 on Windows, specifically involving an unknown function in the cryptbase.dll library of the Windows Service component. It causes an uncontrolled search path, which means the system may load malicious files from unintended locations. Exploiting this vulnerability requires local access to the system and is considered difficult due to the high complexity involved.
How can this vulnerability impact me? :
If exploited, this vulnerability can lead to a compromise of confidentiality, integrity, and availability of the affected system. Because it involves uncontrolled search path manipulation, an attacker with local access might execute malicious code or cause the system to behave unexpectedly, potentially leading to significant security breaches.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know