CVE-2026-22923 is a stack-based buffer overflow vulnerability classified under CWE-121, affecting Siemens NX software versions prior to V2512. The flaw exists in the PDF export functionality where insufficient data validation allows an attacker with local access to corrupt internal memory structures. This vulnerability can be triggered during the processing of PDF export operations, leading to memory corruption that could enable arbitrary code execution within the context of the affected application. The CVSS 3.1 base score is 7.8, reflecting high severity due to the potential for full system compromise. The attack vector is local (AV:L), requiring user interaction (UI:R) but no privileges (PR:N), and the impact spans confidentiality, integrity, and availability (all high). Although no public exploits are known, the vulnerability poses a significant risk to environments where Siemens NX is used, particularly in engineering and manufacturing workflows. The vulnerability was reserved in January 2026 and published in February 2026, indicating recent discovery and disclosure. Siemens NX is widely used in European industrial sectors, increasing the relevance of this vulnerability in those contexts.

For European organizations, particularly those in manufacturing, automotive, aerospace, and industrial design sectors that rely heavily on Siemens NX, this vulnerability could lead to severe operational disruptions. Arbitrary code execution could allow attackers to execute malicious payloads, steal intellectual property, or disrupt production workflows. The requirement for local access limits remote exploitation but insider threats or compromised endpoints could still be leveraged. The compromise of design files or export processes could result in data breaches or sabotage of product designs, impacting business continuity and competitive advantage. Additionally, the high integrity and availability impact could cause downtime or corrupted outputs, affecting supply chains and contractual obligations. Given Siemens' strong market presence in countries like Germany, France, and the UK, the threat is particularly pertinent to these regions' critical industrial infrastructure.

1. Apply patches or upgrade Siemens NX to version V2512 or later immediately upon release to remediate the vulnerability. 2. Restrict local access to systems running Siemens NX to trusted personnel only, employing strict access controls and endpoint security measures. 3. Implement application whitelisting and behavior monitoring to detect anomalous activities during PDF export operations. 4. Educate users about the risks of interacting with untrusted files or processes within Siemens NX. 5. Employ network segmentation to isolate engineering workstations from broader enterprise networks to limit lateral movement. 6. Regularly audit and monitor logs for unusual activity related to Siemens NX usage, especially around PDF export events. 7. Consider deploying host-based intrusion detection systems (HIDS) to identify exploitation attempts. 8. Maintain up-to-date backups of critical design data to enable recovery in case of compromise.