CVE-2025-52660
Published: 19 January 2026
Summary
CVE-2025-52660 is a low-severity Improper Neutralization of HTTP Headers for Scripting Syntax (CWE-644) vulnerability in Hcltech Aion. Its CVSS base score is 2.7 (Low).
Operationally, exploitation aligns with the MITRE ATT&CK technique Web Shell (T1505.003); ranked at the 19.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-3 (Malicious Code Protection).
Deeper analysis
CVE-2025-52660 is an Unrestricted File Upload vulnerability affecting HCL AION. This flaw enables the upload of malicious files, which could potentially lead to unauthorized code execution or system compromise. The vulnerability is classified under CWE-644 and has a CVSS v3.1 base score of 2.7 (AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N), indicating low severity primarily due to the high privileges required for exploitation.
Attackers with high-privilege access, such as authenticated administrators, can exploit this vulnerability over the network with low complexity and no user interaction required. Successful exploitation allows limited unauthorized access to confidential information, though the unchanged scope limits broader impacts on integrity or availability. While the description notes potential for code execution or system compromise, the scored impact remains low confidentiality disclosure.
The HCL Software support knowledge base article at https://support.hcl-software.com/kb_view.do?sys_kb_id=4b92474633de7ad4159a05273e5c7b4b&searchTerm=kb0127995# provides details on mitigation, including any available patches or workarounds for HCL AION. Security practitioners should consult this advisory for specific remediation steps.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-3210
Vulnerability details
HCL AION is affected by an Unrestricted File Upload vulnerability. This can allow malicious file uploads, potentially resulting in unauthorized code execution or system compromise.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unrestricted file upload directly enables web shell deployment (T1505.003) and subsequent command/script execution (T1059) on the server.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Enforces validation of file type, content, and extension on uploads to HCL AION, directly blocking the unrestricted malicious file uploads described in CVE-2025-52660.
Requires automated scanning and blocking of malicious code in uploaded files before they can be stored or executed on the AION system.
Limits file-upload functionality to only those accounts that require it, reducing the attack surface for the high-privilege exploitation path noted in the CVE.