CVE-2026-21273
8.7Adobe · ColdFusion
An improper input validation vulnerability in Adobe ColdFusion allows an authenticated attacker to escalate privileges via a web-based attack.
Executive summary
This high-severity vulnerability in Adobe ColdFusion could allow an authenticated attacker to escalate privileges, leading to unauthorized control over the application.
Vulnerability
This vulnerability is caused by improper input validation (CWE-20). It allows an attacker who already possesses low-level authenticated access to escalate their privileges within the application environment.
Business impact
Successful exploitation results in unauthorized privilege escalation, which can allow an attacker to bypass security boundaries and access sensitive administrative functions. With a CVSS score of 8.7, this vulnerability poses a high risk to the integrity and confidentiality of the ColdFusion application and any data it manages.
Remediation
Immediate Action: Update Adobe ColdFusion 2025 to version 2025.0.12 or higher, and ColdFusion 2023 to version 2023.0.23 or higher.
Proactive Monitoring: Audit user access logs for unusual privilege changes or unauthorized attempts to access administrative endpoints within the ColdFusion management interface.
Compensating Controls: Implement strict input sanitization at the network level and enforce the principle of least privilege for all application users to limit the potential impact of an escalation attempt.
Exploitation status
Public Exploit Available: No
Analyst recommendation
Administrators must perform the recommended updates immediately to address the input validation flaw. Given the nature of privilege escalation, ensuring that all ColdFusion instances are running the latest patched versions is essential for maintaining a secure application environment.