Is CVE-2026-39959 actively exploited?

No active exploitation of CVE-2026-39959 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-39959 be exploited remotely?

No. CVE-2026-39959 requires local access to exploit.

What is the CVSS score of CVE-2026-39959?

CVE-2026-39959 has a CVSS score of 7.1 (HIGH).

HOME VULNERABILITIESCVE-2026-39959

HIGH

CVE-2026-39959

CWE-290Published: April 9, 2026· Updated: Apr 13, 2026

7.1

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.6th

Official Description

Tmds.DBus provides .NET libraries for working with D-Bus from .NET. Tmds.DBus and Tmds.DBus.Protocol are vulnerable to malicious D-Bus peers. A peer on the same bus can spoof signals by impersonating the owner of a well-known name, exhaust system resources or cause file descriptor spillover by sending messages with an excessive number of Unix file descriptors, and crash the application by sending malformed message bodies that cause unhandled exceptions on the SynchronizationContext. This vulnerability is fixed in Tmds.DBus 0.92.0 and Tmds.DBus.Protocol 0.92.0 and 0.21.3.

NVD Source

Technical Analysis

CVE-2026-39959 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.1.