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CVE-2026-75699 – Unauthenticated Remote Code Execution – Adobe Campaign Classic ≤ 7.4.4 build 9401

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Summary

CVE-2026-75699 is a critical Code Injection vulnerability (CWE-94: Improper Control of Generation of Code) affecting Adobe Campaign Classic (ACC). The flaw allows an attacker to achieve arbitrary code execution in the context of the current user, and can be exploited remotely over the network without authentication or any user interaction. Adobe rated the issue at the maximum CVSS v3.1 base score of 10.0 and addressed it in security bulletin APSB26-142, released as part of its September 2026 Patch Tuesday updates.

Technical details

  • Root cause: Improper control of code generation within Adobe Campaign Classic allows attacker-supplied input to be interpreted and executed as code (CWE-94).
  • Trigger conditions: No authentication or privileges are required, and successful exploitation does not require any interaction from a victim user.
  • Attack vector: Network-based (AV:N) — an attacker can send a crafted request to a reachable/exposed Campaign Classic instance to trigger the flaw.
  • Impact: Full compromise of confidentiality, integrity, and availability (C:H/I:H/A:H), with a changed scope (S:C), resulting in arbitrary code execution in the context of the application/current user, which can lead to complete takeover of the affected server.
  • Deployment scope: The bulletin applies to fully on-premise Adobe Campaign Classic deployments and to the on-premise components of hybrid deployments. Adobe-hosted instances were already remediated by Adobe and require no customer action.

Affected software

  • Adobe Campaign Classic (ACC) v7 — all versions up to and including 7.4.4 build 9401 (Windows and Linux) are vulnerable.

Severity

  • CVSS v3.1 Base Score: 10.0 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Upgrade self-hosted Adobe Campaign Classic instances to version 7.4.4 build 9402 or later, as provided in Adobe’s APSB26-142 security bulletin.
  • If patching cannot be applied immediately: Restrict network access to Campaign Classic management/application interfaces to trusted internal networks or VPN only, and monitor exposed instances closely for anomalous activity until the patch can be applied.
  • Verification: After patching, confirm the build number reflects 7.4.4 build 9402 or higher on all on-premise nodes and hybrid-deployment on-premise components.
  • Note: Adobe-hosted Campaign Classic environments were already remediated by Adobe and do not require customer action for this issue.

References

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