Attack Chain

1. An attacker identifies a vulnerable endpoint in Salesforce Marketing Cloud Engagement that processes user-supplied input without proper sanitization.
2. The attacker crafts a malicious HTTP request to the vulnerable endpoint, embedding argument delimiters and potentially harmful commands within the input parameters.
3. The vulnerable application fails to properly neutralize the argument delimiters, allowing the attacker-supplied commands to be interpreted as legitimate arguments.
4. The application executes the constructed command, potentially passing the malicious arguments to underlying system calls or libraries.
5. The injected arguments manipulate the behavior of the executed command, allowing the attacker to perform unintended actions.
6. Depending on the injected arguments and the permissions of the application, the attacker may gain unauthorized access to sensitive data, modify application settings, or execute arbitrary code.
7. The attacker successfully manipulates the Web Services Protocol, changing the intended behavior of the system.
8. The attacker achieves the objective of protocol manipulation, gaining unauthorized control or access to sensitive information within Salesforce Marketing Cloud Engagement.

Impact

Successful exploitation of CVE-2026-2298 could allow an attacker to manipulate Web Services Protocols within Salesforce Marketing Cloud Engagement, potentially leading to unauthorized access to sensitive customer data, modification of application settings, or disruption of services. Given the widespread use of Salesforce Marketing Cloud Engagement by businesses for marketing automation and customer relationship management, a successful attack could have significant consequences, affecting numerous organizations and potentially exposing the personal data of millions of customers.

Recommendation

• Apply the security patch or upgrade to a version of Salesforce Marketing Cloud Engagement released on or after January 30th, 2026, as recommended by Salesforce (https://help.salesforce.com/s/articleView?id=005299346&type=1).
• Implement input validation and sanitization measures to prevent argument injection attacks. Focus on sanitizing input passed to web service protocols.
• Monitor web server logs for suspicious requests containing argument delimiters or unusual command sequences to detect potential exploitation attempts. Deploy the Sigma rule provided in this brief to your SIEM and tune for your environment.
• Consider deploying a Web Application Firewall (WAF) with rules to block common argument injection payloads.