CVE-2025-22467 is a stack-based buffer overflow vulnerability identified in Ivanti Connect Secure, a widely used VPN solution for secure remote access. The flaw exists in versions before 22.7R2.6 and allows a remote attacker with valid authentication credentials to trigger a buffer overflow on the stack. This memory corruption can be exploited to execute arbitrary code remotely, potentially leading to full system compromise. The vulnerability is classified under CWE-121, indicating improper handling of buffer boundaries on the stack. The CVSS v3.1 base score is 9.9, reflecting critical severity with attack vector as network (remote), low attack complexity, requiring privileges (authenticated user), no user interaction, and scope change. The impact includes complete confidentiality, integrity, and availability loss, meaning attackers can steal sensitive data, modify system configurations, or disrupt service. Although no public exploits have been reported yet, the vulnerability's nature and high severity make it a prime target for attackers aiming to compromise VPN gateways, which are critical security infrastructure components. Ivanti Connect Secure is deployed globally across enterprises, government agencies, and service providers, making this vulnerability a significant risk to secure remote access environments. The lack of available patches at the time of disclosure necessitates immediate risk mitigation and monitoring.

The potential impact of CVE-2025-22467 is severe for organizations worldwide. Successful exploitation allows attackers to execute arbitrary code remotely on Ivanti Connect Secure devices, leading to full system compromise. This can result in unauthorized access to internal networks, data exfiltration, disruption of VPN services, and lateral movement within corporate environments. Given that VPN appliances serve as gateways for remote workers and trusted connections, compromise can undermine the entire network security posture. Confidentiality is at risk as attackers may access sensitive information passing through or stored on the device. Integrity can be compromised by altering configurations or injecting malicious payloads. Availability may be disrupted by crashing or disabling the VPN service. The requirement for authentication reduces the attack surface but does not eliminate risk, especially if credentials are weak, reused, or stolen. Organizations relying on Ivanti Connect Secure for remote access, especially those in critical infrastructure, finance, healthcare, and government sectors, face heightened risk of espionage, data breaches, and operational disruption.

To mitigate CVE-2025-22467, organizations should take the following specific actions: 1) Immediately plan to upgrade Ivanti Connect Secure appliances to version 22.7R2.6 or later once the patch is released by the vendor. 2) Until patches are available, restrict VPN access to trusted IP addresses and enforce multi-factor authentication to reduce the risk of credential abuse. 3) Conduct thorough audits of VPN user accounts to disable or remove unnecessary or inactive accounts, minimizing the pool of authenticated users. 4) Monitor VPN appliance logs and network traffic for unusual activity indicative of exploitation attempts, such as unexpected process executions or memory anomalies. 5) Employ network segmentation to isolate VPN appliances from critical internal systems, limiting attacker lateral movement if compromise occurs. 6) Implement strict password policies and credential hygiene to prevent attackers from gaining authenticated access. 7) Consider deploying intrusion detection or prevention systems with signatures tuned to detect exploitation attempts targeting this vulnerability. 8) Maintain regular backups of VPN appliance configurations and system states to enable rapid recovery if compromised. These measures, combined with prompt patching, will significantly reduce the risk posed by this vulnerability.