CVE-2026-34352
Modified Modified - Updated After Analysis
Improper Permissions in TigerVNC x0vncserver Enables Screen Access

Publication date: 2026-03-26

Last updated on: 2026-06-04

Assigner: MITRE

Description
In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions.
CVSS Scores
EPSS Scores
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Meta Information
Published
2026-03-26
Last Modified
2026-06-04
Generated
2026-06-16
AI Q&A
2026-03-27
EPSS Evaluated
2026-06-15
NVD
CVE-2026-34352
EUVD
EUVD-2026-16468
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
tigervnc tigervnc to 1.16.2 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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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.
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Executive Summary

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.

Compliance Impact

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.

Impact Analysis

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.

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