Key points
- The vulnerability is tracked as CVE-2026-105895 with a CVSS score of 9.9.
- It affects Adobe Experience Manager versions 6.5 through 6.5.25.
- Exploitation requires no user interaction and can lead to arbitrary code execution.
A critical security flaw in Adobe Experience Manager allows attackers to execute arbitrary code on affected systems without requiring any interaction from the user. According to the National Vulnerability Database, this issue stems from improper input validation, a weakness classified under CWE-20. The vulnerability could result in arbitrary code execution in the context of the current user, potentially gaining elevated access or control over the victim's account or session. This remote code execution risk applies specifically to Adobe Experience Manager 6.5 up to version 6.5.25.
By the numbers
- CVSS 9.9: The severity rating assigned to CVE-2026-105895, indicating a critical threat level.
- 6.5.25: The highest version of Adobe Experience Manager 6.5 confirmed to be affected by this flaw.
- CWE-20: The Common Weakness Enumeration identifier for the improper input validation causing the issue.
What the figures mean
The CVSS score of 9.9 reflects the high severity of this vulnerability, as it allows for remote code execution without user interaction. This means an attacker can exploit the flaw from a distance, potentially gaining control over the victim's account or session. The scope change noted in the vulnerability description is part of the official record for CVE-2026-105895. For organizations running Adobe Experience Manager 6.5 through 6.5.25, this poses a significant risk that requires immediate attention.
What to watch
Security teams should monitor for unusual activity on Adobe Experience Manager servers, particularly signs of unauthorized code execution or privilege escalation. The National Vulnerability Database highlights that this flaw could allow attackers to gain control over victim accounts or sessions. Organizations should verify their current version of Adobe Experience Manager to determine if they fall within the affected range. Keeping an eye on official Adobe security advisories will provide updates on potential patches or mitigation strategies.
Infection and persistence in general
Teams usually detect such flaws through network monitoring or endpoint alerts triggered by unexpected code execution. Analysts examine logs for anomalous input patterns that bypass validation checks. Persistence often involves creating new user accounts or modifying system configurations to maintain access. Spread typically occurs via lateral movement, leveraging stolen credentials or exploiting additional vulnerabilities. Check whether your systems enforce strict input validation and monitor for unauthorized changes to user permissions or system files.
Background: Input validation
Input validation is the process of checking that data meets strict format, type, length, and range requirements before processing. It prevents injection attacks and logic bugs by ensuring the system only handles expected values. This defense operates at the application layer, complementing network controls and secure coding practices.
Read the full guide: Input Validation: How to Stop Bad Data at the Border
What to do and how to stay safe: Adobe Experience Manager
- Verify your Adobe Experience Manager version to see if it falls within the affected range of 6.5 to 6.5.25.
- Monitor server logs for signs of unauthorized code execution or unusual input patterns that may indicate exploitation.
- Implement strict input validation measures to mitigate the risk of improper input processing.
- Stay updated on official Adobe security advisories for patches or mitigation guidance once available.
Step-by-step guide: Patch Management Implementation: A Step-by-Step Rollout Plan
General security guidance from the Sandbox Gazette newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
Which versions of Adobe Experience Manager are affected by CVE-2026-105895?
Adobe Experience Manager versions 6.5 through 6.5.25 are affected by this critical vulnerability.
Does exploiting this vulnerability require user interaction?
No, exploitation of CVE-2026-105895 does not require user interaction, allowing remote code execution.
What is the CVSS score for this vulnerability?
The CVSS score for CVE-2026-105895 is 9.9, indicating a critical severity level.
