CVE-2026-1007 in Server
Summary
by MITRE • 01/19/2026
Incorrect Authorization vulnerability in virtual gateway component in Devolutions Server allows attackers to bypass deny IP rules.This issue affects Server: from 2025.3.1 through 2025.3.12.
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Analysis
by VulDB Data Team • 02/11/2026
The vulnerability identified as CVE-2026-1007 represents a critical authorization flaw within the virtual gateway component of Devolutions Server versions 2025.3.1 through 2025.3.12. This weakness stems from improper validation of access controls that govern network traffic routing and IP address restrictions. The vulnerability specifically targets the server's ability to enforce deny IP rules, which are fundamental security mechanisms designed to prevent unauthorized network access based on source IP addresses. The flaw exists in the virtual gateway's authorization logic where incoming connection requests are evaluated against configured access control lists, creating a scenario where malicious actors can bypass these protective measures.
The technical implementation of this vulnerability manifests when the virtual gateway component fails to properly validate or enforce IP address restrictions during connection establishment. Attackers can exploit this by crafting specific network requests that appear to originate from authorized IP ranges while actually being generated from unauthorized sources. This misconfiguration allows unauthorized users to establish connections through the gateway even when their IP addresses have been explicitly denied in the access control configuration. The vulnerability operates at the network layer where the gateway should enforce strict authorization checks but instead permits connections that should be rejected based on configured deny rules. This flaw aligns with CWE-285, which addresses improper authorization issues in software systems, and specifically demonstrates weaknesses in access control enforcement mechanisms.
The operational impact of CVE-2026-1007 extends beyond simple unauthorized access to encompass potential data breaches, system compromise, and unauthorized administrative access. Organizations relying on Devolutions Server for secure remote access may find their network perimeter weakened, allowing attackers to bypass network segmentation controls that are critical for protecting sensitive environments. The vulnerability creates a persistent backdoor that remains active as long as the affected server versions are operational, potentially enabling attackers to escalate privileges, access restricted resources, or conduct lateral movement within the network. This issue particularly affects organizations that depend on IP-based access controls for their security posture, as it undermines the fundamental principle of least privilege enforcement that should govern all network access.
Security professionals should prioritize immediate remediation of this vulnerability by upgrading to Devolutions Server version 2025.3.13 or later, which contains the necessary patches to correct the authorization logic in the virtual gateway component. Organizations should also conduct thorough network audits to identify any unauthorized access that may have occurred during the vulnerability window, particularly focusing on connection logs from the affected gateway component. Network segmentation should be reviewed to ensure that additional protective measures are in place even if the primary authorization mechanism fails. The vulnerability demonstrates the importance of implementing defense-in-depth strategies where multiple layers of security controls work together to prevent exploitation, as highlighted in the MITRE ATT&CK framework's emphasis on privilege escalation and lateral movement techniques that exploit similar authorization flaws. System administrators should monitor for unusual connection patterns and implement additional logging mechanisms to detect potential exploitation attempts.