CVE-2025-55139 is a Server-Side Request Forgery (SSRF) vulnerability classified under CWE-918, affecting multiple Ivanti products including Connect Secure, Policy Secure, ZTA Gateway, and Neurons for Secure Access. The vulnerability exists in versions prior to 22.7R2.9 or 22.8R2 for Connect Secure, 22.7R1.6 for Policy Secure, 2.8R2.3-723 for ZTA Gateway, and 22.8R1.4 for Neurons for Secure Access. It allows a remote attacker who has authenticated with administrative privileges to abuse the server's ability to make HTTP requests on behalf of the attacker. This can be leveraged to enumerate internal services that are otherwise inaccessible externally, potentially exposing sensitive internal network information. The vulnerability does not allow direct compromise of confidentiality or integrity of data on the server but enables reconnaissance that could facilitate further attacks. The CVSS v3.1 score is 6.8 (medium severity), reflecting that the attack vector is network-based, requires high privileges (admin authentication), no user interaction, and impacts confidentiality with a scope change (the attacker can access internal resources beyond the original security boundary). No known exploits are reported in the wild as of the publication date (September 2025). The fix was deployed on August 2, 2025, indicating that patched versions are available. The vulnerability is significant because Ivanti Connect Secure and related products are widely used for secure remote access and VPN services, often acting as gateways to internal corporate networks. SSRF vulnerabilities in such products can be leveraged to bypass network segmentation and access internal-only services, potentially exposing sensitive infrastructure components, internal APIs, or management interfaces that could be further exploited.

For European organizations, this vulnerability poses a risk primarily to the confidentiality of internal network architecture and services. Since Ivanti Connect Secure and related products are commonly deployed as VPN and secure access gateways, exploitation could allow an attacker with admin credentials to map internal services, which may include databases, directory services, or internal management consoles. This reconnaissance can facilitate lateral movement or targeted attacks within the network. Although direct data modification or denial of service is not indicated, the exposure of internal services could lead to subsequent high-impact attacks. Given the GDPR and other stringent data protection regulations in Europe, unauthorized internal reconnaissance could lead to compliance violations if it results in data breaches. Organizations relying on Ivanti products for remote access should consider this vulnerability a significant risk vector, especially in environments where administrative credentials might be compromised or insufficiently protected. The medium severity rating reflects the requirement for admin authentication, but the potential for internal network exposure elevates the risk profile in sensitive or critical infrastructure sectors.

1. Immediate application of vendor patches: Organizations should upgrade affected Ivanti products to the fixed versions released on or after August 2, 2025. 2. Restrict administrative access: Limit admin privileges to trusted personnel and enforce strong multi-factor authentication (MFA) to reduce the risk of credential compromise. 3. Network segmentation and filtering: Implement strict egress and internal firewall rules to limit the ability of the VPN gateway to access sensitive internal services unnecessarily. 4. Monitor and audit administrative actions: Enable detailed logging and monitoring of admin activities on Ivanti devices to detect unusual SSRF-related requests or enumeration attempts. 5. Conduct internal vulnerability assessments: Regularly scan internal services for exposure and validate that internal endpoints are not unnecessarily accessible from the VPN gateway. 6. Incident response readiness: Prepare to investigate potential SSRF exploitation attempts by correlating logs and network traffic for suspicious internal service access patterns. These steps go beyond generic advice by focusing on administrative access controls, network architecture hardening, and proactive monitoring tailored to the nature of SSRF in secure access gateways.