CVE-2022-30426 is a high-severity stack buffer overflow vulnerability identified in the UEFI DXE (Driver Execution Environment) firmware drivers of multiple Acer desktop and workstation models. The vulnerability allows an attacker to execute arbitrary code with elevated privileges by exploiting a buffer overflow condition during the UEFI DXE phase of system boot. Specifically, the flaw enables privilege escalation from ring 3 (user mode) to ring 0 (kernel mode), effectively allowing an attacker to hijack the control flow of the firmware execution. This can lead to persistent compromise at the firmware level, which is difficult to detect and remediate. The affected devices include a broad range of Acer models such as Altos T110 F3, AP130 F2, Aspire 1600X, 1602M, 7600U, MC605, TC-105, TC-120, U5-620, X1935, X3475, X3995, XC100, XC600, Z3-615, and Veriton E430G, B630_49, E430, M2110G, and M2120G, all running firmware versions up to specified latest versions (e.g., P13, P04, P11.A3L, etc.). The vulnerability is classified under CWE-787 (Out-of-bounds Write), indicating a buffer overflow that overwrites memory beyond the intended boundary. The CVSS v3.1 base score is 7.8, reflecting high impact with attack vector local (requiring local access), low attack complexity, low privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. Although no known exploits are currently reported in the wild, the potential for firmware-level compromise makes this a critical concern. The lack of publicly available patches at the time of reporting increases the urgency for affected organizations to monitor for vendor updates and apply firmware upgrades promptly once available.

For European organizations, this vulnerability poses a significant risk due to the potential for stealthy, persistent firmware-level compromise. Successful exploitation could allow attackers to bypass operating system security controls, install rootkits or bootkits, and maintain long-term access even after OS reinstallation. This threatens the confidentiality, integrity, and availability of critical systems, particularly in sectors relying on Acer hardware such as government agencies, financial institutions, healthcare providers, and critical infrastructure operators. The local attack vector implies that attackers need initial access to the system, which could be achieved via insider threats, compromised user accounts, or physical access. Given the high impact on system security and the difficulty in detecting firmware compromises, European organizations face increased risk of espionage, sabotage, or data theft. Additionally, the broad range of affected Acer models, some of which are common in enterprise environments, increases the potential attack surface. The absence of known exploits currently reduces immediate risk but does not eliminate the threat, as attackers may develop exploits over time. The vulnerability also complicates incident response and recovery, as firmware re-flashing requires specialized tools and procedures.

1. Immediate Inventory and Assessment: European organizations should identify all Acer systems running the affected firmware versions listed and prioritize them for remediation. 2. Firmware Updates: Monitor Acer’s official channels for firmware patches addressing CVE-2022-30426 and apply updates as soon as they become available. Firmware updates should be tested in controlled environments before deployment to avoid operational disruptions. 3. Restrict Local Access: Since the attack vector is local, enforce strict physical security controls and limit administrative access to trusted personnel only. Implement strong endpoint protection and user account management to reduce the risk of initial compromise. 4. Enable Secure Boot and Firmware Protection: Ensure Secure Boot is enabled to prevent unauthorized firmware modifications. Utilize hardware-based protections such as TPM and BIOS write protections to reduce the risk of firmware tampering. 5. Monitor for Anomalies: Deploy advanced endpoint detection and response (EDR) solutions capable of detecting unusual firmware or boot-level behavior. Regularly audit system integrity and firmware versions. 6. Incident Response Preparedness: Develop and test incident response plans that include firmware compromise scenarios, including procedures for firmware re-flashing and system recovery. 7. Vendor Engagement: Engage with Acer support and cybersecurity advisories to stay informed about updates, patches, and mitigation guidance specific to this vulnerability. 8. Network Segmentation: Isolate critical systems with affected hardware to limit lateral movement in case of compromise.