Adobe ColdFusion versions 2023.18, 2025.6, and earlier contain an Improper Input Validation vulnerability (CWE-20) identified as CVE-2026-27306. This vulnerability can lead to arbitrary code execution by an attacker who already has elevated privileges, contingent upon user interaction via opening a malicious file. The CVSS v3.1 score is 8.4, reflecting a high severity with network attack vector requiring low attack complexity, but with high privileges required and no user interaction needed beyond opening the file. The vulnerability affects confidentiality, integrity, and availability with a scope change. No patch or official remediation level has been published by Adobe as of the data provided.

Successful exploitation of this vulnerability could allow an attacker with elevated privileges to execute arbitrary code within the context of the current user, potentially compromising system confidentiality, integrity, and availability. The requirement for user interaction (opening a malicious file) limits the attack vector but does not eliminate risk. There are no known exploits in the wild currently, reducing immediate threat but the high CVSS score indicates serious potential impact if exploited.

No official patch or remediation guidance is currently available from Adobe. Users should monitor Adobe advisories for updates and apply patches promptly once released. Until a fix is available, restrict elevated privileges to trusted users only and exercise caution with files received from untrusted sources to mitigate the risk of exploitation via malicious files.