Adobe Campaign Classic (ACC) is affected by a critical SQL injection vulnerability (CVE-2026-48330) with a CVSS score of 10.0. This flaw arises from improper neutralization of special elements in SQL commands, enabling attackers to execute arbitrary SQL queries. Successful exploitation could result in arbitrary code execution under the context of the current user, allowing elevation of privileges, data exfiltration, or full system control. The vulnerability does not require user interaction, making it particularly dangerous for exposed instances. All versions of Adobe Campaign Classic are affected. Attackers could leverage this issue to bypass authentication mechanisms, manipulate backend databases, or deploy malicious payloads. Immediate application of vendor-provided patches is critical to mitigate risks. Organizations should also implement network-level restrictions to limit exposure while remediation is in progress. Given the potential for remote code execution and high exploitability, this vulnerability warrants urgent attention. No third-party tools or workarounds are currently recommended until official fixes are deployed.