Devolutions Remote Desktop Manager 2026.1.x < 2026.1.25.0 / 2026.2.x < 2026.2.18.0 Insufficient Data Authenticity Verification (CVE-2026-78417)

high Nessus Plugin ID 341349

Synopsis

The Devolutions Remote Desktop Manager instance installed on the remote host is affected by an insufficient data authenticity verification vulnerability.

Description

The version of Devolutions Remote Desktop Manager installed on the remote host is 2026.1.x prior to 2026.1.25.0 or 2026.2.x prior to 2026.2.18.0. It is, therefore, affected by a vulnerability:

- Insufficient verification of data authenticity in the IronVNC client allows an on-path attacker to intercept and tamper with VNC sessions via automatic acceptance of the server's RSA key during RSA-AES authentication.
(CVE-2026-78417)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Devolutions Remote Desktop Manager version 2026.1.25.0 / 2026.2.18.0 or later.

Plugin Details

Severity: High

ID: 341349

File Name: devolutions_remote_desktop_manager_CVE-2026-78417.nasl

Version: 1.1

Type: Local

Agent: windows

Family: Windows

Published: 8/28/2026

Updated: 8/28/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.51

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2026-78417

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v4

Risk Factor: High

Base Score: 7.1

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:H/SI:L/SA:N

Vulnerability Information

CPE: x-cpe:/a:devolutions:remote_desktop_manager

Required KB Items: installed_sw/Devolutions Remote Desktop Manager

Patch Publication Date: 8/24/2026

Vulnerability Publication Date: 8/24/2026

Reference Information

CVE: CVE-2026-78417

CWE: 345

Detections

Analytics