External risk intelligence

Adobe Experience Manager Improper Input Validation leads to Code Execution

CVE advisorySeverity: CRITICAL (CVSS 9.9)

CVE-2026-105895

Adobe Experience Manager is a content management system commonly deployed as a web-facing platform to serve public or enterprise content. Because these systems are frequently exposed to the internet to facilitate web delivery and user access, the vulnerable surface is commonly reachable from the public internet.

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

Adobe Experience Manager has a critical vulnerability in how it handles user input, which could allow an attacker to execute arbitrary code. This could potentially lead to unauthorized access or control over user accounts and sessions without requiring any interaction from the user.

Improper input handling is the core issue.
Critical flaw impacts user accounts and sessions.
Confirm relevance and exposure to Adobe Experience Manager.

Attack Path

How an attacker could exploit the issue

An attacker could target Adobe Experience Manager by sending specially crafted input to the application. If the application improperly validates this input, it could lead to arbitrary code execution within the context of the current user. This could allow an attacker to gain elevated privileges or take control of the victim's session.

Requires authenticated access.
Triggers via improper input validation.
Allows code execution and control.

Live Threat

Current exploitation, exposure, and threat context

This Improper Input Validation vulnerability in Adobe Experience Manager could allow an attacker to execute arbitrary code within the context of the current user. This could potentially lead to elevated access or control over a victim's account or session without requiring any user interaction.

User account or session data at risk.
Arbitrary code execution through network access.
Potential for elevated access or control.

Operational Fix

Recommended remediation, mitigation, and detection steps

This Improper Input Validation vulnerability in Adobe Experience Manager requires immediate attention from teams responsible for application security and platform stability. The first critical step is to identify all instances of Adobe Experience Manager within your environment, determine their exposure (especially to the internet), and confirm their business criticality to prioritize remediation efforts. Engaging with application owners and potentially the vendor will be crucial for a coordinated response.

Application and platform teams should own this issue.
Verify external reachability and business criticality.
Plan vendor-coordinated remediation or mitigation.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is Adobe Experience Manager?

Adobe Experience Manager is a comprehensive content management system used by organizations to build, manage, and deliver digital experiences across websites, mobile apps, and forms. It serves as a central hub for hosting enterprise content and digital assets, often acting as a primary platform for public-facing web presence and internal document workflows.

What does Improper Input Validation mean for CVE-2026-105895?

This weakness, classified as CWE-20, occurs when the software accepts input without sufficiently verifying that it is safe, well-formed, or expected. In this CVE, failing to properly sanitize this input allows the system to process malicious data as legitimate commands, leading to arbitrary code execution where the attacker runs unauthorized instructions within the application's environment.

How does an attacker trigger this vulnerability?

An attacker triggers this flaw by sending specially crafted, malicious input to the application over the network. This exploit requires the attacker to have authenticated access to the system. Importantly, the vulnerability does not require any interaction from the victim; simply processing the malicious input is sufficient to initiate the unauthorized code execution.

Is my instance of Adobe Experience Manager at risk?

Your risk depends on your deployment and network architecture. According to Halo Surface Signal, this software is often deployed as a web-facing platform, making it frequently reachable from the public internet. If your instance is exposed to the internet, it is more easily accessible to external attackers than an instance restricted to an internal, private network.

What should I do to respond to this threat?

Begin by inventorying your environment to locate all instances of Adobe Experience Manager. Once identified, assess the business criticality of each instance and determine its network accessibility. Work closely with your application owners to coordinate with Adobe for the necessary vendor-supplied updates or mitigations to resolve the underlying input validation issues.

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.