CVE-2026-1007 is an incorrect authorization vulnerability categorized under CWE-863, affecting the virtual gateway component of Devolutions Server versions from 2025.3.1 through 2025.3.12. The vulnerability arises because the server improperly enforces deny IP rules, allowing attackers who have already obtained high-level privileges to bypass these restrictions. This bypass can enable unauthorized access to resources that should be blocked based on IP filtering policies, potentially facilitating lateral movement or unauthorized data access within an organization's network. The vulnerability does not require user interaction but does require that the attacker has high privileges on the system, which suggests exploitation is possible only after some level of compromise or insider threat. The CVSS v3.1 base score is 7.6, with vector AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:H/A:N, indicating network attack vector, low attack complexity, high privileges required, no user interaction, scope change, low confidentiality impact, high integrity impact, and no availability impact. No patches or exploits are currently publicly available, but the vulnerability is published and should be addressed promptly. The issue highlights the importance of robust authorization checks in gateway components that enforce network access policies.

For European organizations, this vulnerability poses a significant risk to the confidentiality and integrity of sensitive data and systems accessed via Devolutions Server. Since the vulnerability allows bypassing deny IP rules, attackers with elevated privileges could access restricted network segments or systems, potentially leading to data breaches or unauthorized administrative actions. This is particularly concerning for sectors relying heavily on secure remote access solutions, such as finance, government, healthcare, and critical infrastructure. The inability to enforce IP-based restrictions weakens network segmentation and defense-in-depth strategies, increasing the risk of lateral movement by attackers. Although availability is not impacted, the compromise of integrity and confidentiality can lead to regulatory non-compliance under GDPR and other data protection laws, resulting in legal and financial consequences. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits over time.

European organizations should implement the following specific mitigations: 1) Monitor Devolutions Server deployments and identify all instances running affected versions (2025.3.1 through 2025.3.12). 2) Apply vendor patches immediately once available; in the meantime, restrict access to the virtual gateway component to trusted networks and users only. 3) Enforce multi-factor authentication and strict privilege management to reduce the risk of attackers gaining high-level privileges required for exploitation. 4) Implement additional network segmentation and monitoring to detect anomalous access attempts that bypass IP restrictions. 5) Review and harden IP filtering and firewall rules external to the Devolutions Server to compensate for the vulnerability. 6) Conduct regular audits of access logs and IP filtering effectiveness. 7) Educate administrators about the risk and ensure rapid incident response capabilities are in place. These steps go beyond generic advice by focusing on compensating controls and proactive detection while awaiting patches.