FA Bypass via Session Token Reuse in Devolutions Server

Publication date: 2026-04-01

Last updated on: 2026-04-03

Assigner: Devolutions Inc.

Description

Improper authentication in the two-factor authentication (2FA) feature in Devolutions Server 2026.1.11 and earlier allows a remote attacker with valid credentials to bypass multifactor authentication and gain unauthorized access to the victim account via reuse of a partially authenticated session token.

CVSS Scores

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Meta Information

Published

2026-04-01

Last Modified

2026-04-03

Generated

2026-07-06

AI Q&A

2026-04-01

EPSS Evaluated

2026-07-05

NVD

CVE-2026-4924

EUVD

EUVD-2026-17923

Affected Vendors & Products

Vendor	Product	Version / Range
devolutions	devolutions_server	From 2026.1.1.0 (inc) to 2026.1.12.0 (exc)
devolutions	devolutions_server	to 2025.3.18.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-1390	The product uses an authentication mechanism to restrict access to specific users or identities, but the mechanism does not sufficiently prove that the claimed identity is correct.

Attack-Flow Graph

Executive Summary

This vulnerability is an improper authentication issue in the two-factor authentication (2FA) feature of Devolutions Server version 2026.1.11 and earlier. It allows a remote attacker who already has valid credentials to bypass the multifactor authentication process by reusing a partially authenticated session token, thereby gaining unauthorized access to the victim's account.

Impact Analysis

The impact of this vulnerability is that an attacker with valid credentials can bypass the additional security layer provided by two-factor authentication. This means the attacker can gain unauthorized access to user accounts, potentially leading to data breaches, unauthorized actions, and compromise of sensitive information.

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