CVE-2026-76195 in Campaign Classic
Summary
by MITRE • 08/25/2026
Adobe Campaign Classic (ACC) is affected by an Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability that could result in arbitrary code execution in the context of the current user. An attacker could exploit this vulnerability to execute arbitrary code. Exploitation of this issue does not require user interaction. Scope is changed.
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Analysis
by VulDB Data Team • 08/25/2026
Adobe Campaign Classic contains a critical OS command injection vulnerability classified under CWE-78, which stems from improper neutralization of special elements used in operating system commands. This flaw allows an attacker to inject and execute arbitrary shell commands by manipulating input data that is passed directly to the underlying operating system without adequate sanitization or validation. The root cause lies in the application's failure to properly escape or filter metacharacters such as semicolons, pipes, ampersands, and backticks within user-supplied parameters before they are processed by system-level command interpreters. This lack of input validation creates a direct pathway for malicious code execution, bypassing standard security controls that rely on proper data handling practices to prevent injection attacks.
The operational impact of this vulnerability is severe because it enables arbitrary code execution in the context of the current user running the Adobe Campaign Classic service. Since exploitation does not require any interaction from legitimate users, an attacker can remotely trigger the flaw through automated means or by exploiting exposed endpoints and APIs associated with the application. The scope change indicates that the impact extends beyond local privilege escalation to potentially affect broader system integrity depending on the permissions assigned to the process account. If the service runs with elevated privileges, this could lead to complete compromise of the host system, including data exfiltration, installation of persistent backdoors, or use as a pivot point for further network attacks.
From an adversarial perspective, this vulnerability aligns with MITRE ATT&CK technique T1059 Command and Scripting Interpreter, specifically sub-techniques involving shell commands such as sh or cmd.exe depending on the operating system environment. Attackers can leverage this flaw to execute arbitrary scripts, download additional malware payloads, or modify configuration files to maintain access. The absence of required user interaction significantly lowers the barrier for exploitation, making it a high-risk issue that demands immediate attention from security operations teams and application administrators.
Mitigation strategies should focus on implementing strict input validation and output encoding practices within Adobe Campaign Classic customizations and integrations. Developers must ensure that all external inputs are validated against a whitelist of expected values rather than relying solely on blacklist approaches to block malicious characters. Where possible, the use of safe APIs that do not invoke shell interpreters directly is recommended over constructing command strings dynamically. Additionally, applying the latest security patches provided by Adobe for Adobe Campaign Classic is essential as these updates typically include code fixes addressing such injection flaws. Running the application with least-privilege principles ensures that even if exploitation occurs, the potential damage to the underlying operating system and data stores remains contained within restricted boundaries.