CVE-2026-34352
Improper Permissions in TigerVNC x0vncserver Enables Screen Access
Publication date: 2026-03-26
Last updated on: 2026-04-02
Assigner: MITRE
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| tigervnc | tigervnc | to 1.16.2 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-732 | The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. |
Attack-Flow Graph
AI Powered Q&A
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The vulnerability in TigerVNC before 1.16.2 allows unauthorized users to observe or manipulate screen contents, which could lead to unauthorized access to sensitive information.
Such unauthorized access and potential data exposure may impact compliance with standards and regulations like GDPR and HIPAA, which require protection of personal and sensitive data.
Specifically, the confidentiality (C:H) and integrity (I:L) impacts indicated by the CVSS score suggest risks to data privacy and integrity controls mandated by these regulations.
Can you explain this vulnerability to me?
This vulnerability exists in TigerVNC versions before 1.16.2, specifically in the Image.cxx component of x0vncserver. It allows other users to observe or manipulate the screen contents or cause an application crash due to incorrect permissions.
How can this vulnerability impact me? :
The vulnerability can lead to unauthorized users viewing or altering the screen contents, which compromises confidentiality and integrity. Additionally, it can cause the application to crash, impacting availability.