CVE-2026-75726 in Experience Manager as a Cloud Service
Summary
by MITRE • 09/09/2026
Adobe Experience Manager is affected by an Improper Input Validation vulnerability that could result in a Security feature bypass. A low-privileged attacker could leverage this vulnerability to bypass security measures and gain unauthorized limited write access. Exploitation of this issue requires user interaction in that a victim must visit a maliciously crafted URL or interact with a compromised web page.
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Analysis
by VulDB Data Team • 09/09/2026
Adobe Experience Manager contains an improper input validation flaw within its core request handling mechanisms, which allows for the bypassing of critical security features designed to restrict access based on user privileges. This vulnerability stems from insufficient sanitization and verification of incoming data parameters before they are processed by the application logic. Specifically, the system fails to adequately validate certain inputs that dictate resource permissions or action scopes, creating a gap in the enforcement of role-based access controls. An attacker with low-privileged credentials can exploit this deficiency by crafting specific HTTP requests that manipulate these validation checks. By carefully constructing maliciously crafted URLs or injecting specially formatted data into web forms, an adversary can trick the server into treating unauthorized actions as legitimate operations belonging to higher-level roles.
The operational impact of this vulnerability is significant because it enables a low-privileged attacker to gain limited write access to areas of the system that should remain restricted. This unauthorized write capability allows for the modification or creation of content within Adobe Experience Manager, potentially leading to defacement, data corruption, or further escalation if combined with other vulnerabilities. The requirement for user interaction means that exploitation typically involves social engineering tactics where a victim is directed to visit a maliciously crafted URL or interact with a compromised web page hosted by an attacker. This vector relies on the victim being authenticated within the Adobe Experience Manager environment and having their session active when they encounter the exploit payload, making targeted attacks more feasible than broad automated scans.
From a classification perspective, this vulnerability aligns closely with CWE-20 Improper Input Validation, as the root cause is the failure to properly verify user-supplied data against expected formats or constraints. It also relates to CWE-732 Incorrect Permission Assignment for Critical Resource, since the flaw results in granting write permissions that should not be available to low-privileged users. In terms of offensive security frameworks, this behavior corresponds to MITRE ATT&CK technique T1059 Command and Scripting Interpreter if used to execute further commands, or more broadly to privilege escalation vectors where an attacker leverages misconfigured access controls to expand their footprint within the application environment. The bypass of security features highlights a failure in defense-in-depth strategies, emphasizing that input validation alone is insufficient without robust authorization checks at every layer of the request lifecycle.
Mitigation for this issue requires immediate patching to the latest version of Adobe Experience Manager released by vendor advisories addressing CVE details related to improper input validation and privilege escalation. Administrators should also implement strict access control policies using principle of least privilege, ensuring that even if such a flaw is present in future versions, the blast radius remains contained. Network-level controls such as Web Application Firewalls can be configured to detect anomalous patterns associated with parameter manipulation or unauthorized write attempts. Additionally, monitoring and logging mechanisms should be enhanced to alert on unusual activity from low-privileged accounts attempting to modify system resources. Regular security audits focusing on authentication and authorization logic are essential to identify similar weaknesses before they can be exploited in production environments.