CVE-2026-27304

Adobe · ColdFusion

Adobe ColdFusion versions 2023.18, 2025.6 and earlier are susceptible to an Improper Input Validation vulnerability, enabling unauthenticated arbitrary code execution.

Executive summary

A critical improper input validation flaw in Adobe ColdFusion enables unauthenticated remote attackers to execute arbitrary code on the host system.

Vulnerability

The vulnerability is caused by improper input validation within the ColdFusion environment. This allows an attacker to execute arbitrary code in the context of the current system user without requiring any user interaction or authentication.

Business impact

With a CVSS score of 9.3, this vulnerability represents a severe threat to the entire server infrastructure. Successful exploitation grants an attacker full control over the application server, facilitating data exfiltration, lateral movement within the network, and the deployment of persistent malware or ransomware, leading to catastrophic business disruption.

Remediation

Immediate Action: Update all Adobe ColdFusion instances to the latest available version provided by the vendor to remediate the input validation defect.

Proactive Monitoring: Monitor server logs for suspicious process execution, unusual inbound network traffic, or unauthorized file modifications that could indicate successful code injection.

Compensating Controls: Deploy a Web Application Firewall (WAF) with updated rulesets to inspect incoming traffic and block malicious payloads targeting ColdFusion input parameters.

Exploitation status

Public Exploit Available: Unknown

Analyst recommendation

This vulnerability is highly critical due to the lack of required authentication or user interaction. Administrators must treat this as a high-priority patching task, ensuring all vulnerable ColdFusion instances are updated immediately to prevent potential remote code execution by external adversaries.