CVE-2026-84850

Received Received - Intake

Improper Certificate Validation in Devolutions Server

Publication date: 2026-09-15

Last updated on: 2026-09-20

Assigner: Devolutions Inc.

Description

Improper certificate validation in the shared HTTP client used by synchronization and integration features in Devolutions Server 2026.2.16 and earlier allows a network-positioned attacker to intercept and tamper with outbound TLS connections via a spoofed or self-signed certificate.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-15

Last Modified

2026-09-20

Generated

2026-10-06

AI Q&A

2026-09-16

EPSS Evaluated

2026-10-04

NVD

CVE-2026-84850

EUVD

EUVD-2026-79188

Affected Vendors & Products

Vendor	Product	Version / Range
devolutions	server	to 2026.2.16 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-295	The product does not validate, or incorrectly validates, a certificate.

Attack-Flow Graph

Executive Summary

This vulnerability involves improper certificate validation in Devolutions Server's shared HTTP client. It affects synchronization and integration features, allowing a network attacker to intercept and alter outbound TLS connections using spoofed or self-signed certificates.

Detection Guidance

Detecting this vulnerability requires checking if Devolutions Server is running an affected version. Inspect the server version via the admin interface or logs. Network monitoring tools can detect unusual TLS interception attempts.

Impact Analysis

An attacker could eavesdrop on or modify sensitive data transmitted by the server, such as credentials or confidential information, leading to potential data breaches or unauthorized access.

Compliance Impact

This vulnerability could result in unauthorized access to personal or health data, violating GDPR and HIPAA requirements for data protection and encryption. Non-compliance may lead to legal penalties and reputational damage.

Mitigation Strategies

Upgrade Devolutions Server to version 2026.3.5.0 or higher immediately. Disable synchronization and integration features temporarily if upgrading is not possible.

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