CVE-2026-28725 is a vulnerability identified in Acronis Cyber Protect 17, a widely used cybersecurity and backup solution for enterprise environments on Linux and Windows platforms. The flaw arises from improper configuration of a headless browser component embedded within the product. Specifically, this vulnerability is categorized under CWE-732, which refers to incorrect permission assignment for critical resources. The headless browser, likely used for rendering or automation tasks, is misconfigured such that sensitive information it processes or stores can be accessed by unauthorized local users with limited privileges. The CVSS 3.0 base score is 5.5, indicating a medium severity level. The attack vector is local (AV:L), requiring low privileges (PR:L) but no user interaction (UI:N). The impact is primarily on confidentiality (C:H), with no impact on integrity or availability. This means an attacker with some local access can extract sensitive data without altering system state or causing downtime. The vulnerability affects all versions of Acronis Cyber Protect 17 prior to build 41186 on both Linux and Windows. No public exploits or active exploitation have been reported to date. The root cause is the misconfiguration of permissions or access controls on the headless browser resource, allowing unauthorized local users to read sensitive information that should be protected. This could include credentials, session tokens, or other confidential data handled by the browser component. Since the vulnerability requires local access and low privileges, it is primarily a risk in environments where multiple users share systems or where attackers can gain limited user accounts. The lack of user interaction requirement means exploitation can be automated once local access is obtained. The vulnerability underscores the importance of secure configuration and permission management for embedded components in security products. No patch links are currently provided, indicating that remediation may require updating to build 41186 or later once available or applying vendor guidance on configuration hardening.

The primary impact of CVE-2026-28725 is unauthorized disclosure of sensitive information within environments using Acronis Cyber Protect 17. Since the vulnerability affects a security product, the exposure of confidential data could undermine the overall security posture of affected organizations. Attackers with low-level local access could leverage this flaw to escalate privileges or gather intelligence for further attacks. This is particularly concerning in multi-tenant or shared environments where local user separation is critical. The confidentiality breach could include sensitive backup data, credentials, or internal system information processed by the headless browser. Although the vulnerability does not affect integrity or availability, the loss of confidentiality in security software can lead to secondary compromises, including data theft, lateral movement, or evasion of detection. Organizations relying heavily on Acronis Cyber Protect 17 for backup and cybersecurity may face increased risk of insider threats or attacks from compromised low-privilege accounts. The absence of known exploits reduces immediate risk but does not eliminate the potential for future exploitation. Overall, the vulnerability could impact organizations globally, especially those in sectors with stringent data protection requirements such as finance, healthcare, government, and critical infrastructure.

1. Upgrade Acronis Cyber Protect 17 to build 41186 or later as soon as the patch is available from the vendor to ensure the vulnerability is remediated. 2. Until patches are applied, restrict local user access on systems running Acronis Cyber Protect to trusted personnel only, minimizing the risk of exploitation by low-privilege users. 3. Review and harden permissions and configurations related to the headless browser component, ensuring it does not expose sensitive data to unauthorized users. 4. Implement strict access controls and monitoring on systems hosting Acronis Cyber Protect, including auditing local user activities and privilege escalations. 5. Employ endpoint detection and response (EDR) solutions to detect suspicious local activities that could indicate attempts to exploit this vulnerability. 6. Educate system administrators and security teams about the vulnerability and the importance of securing local accounts and permissions. 7. Isolate critical backup and cybersecurity infrastructure from general user environments to reduce exposure. 8. Follow vendor advisories and subscribe to security bulletins for timely updates and patches. These steps go beyond generic advice by focusing on local access restrictions, configuration hardening of the headless browser, and monitoring tailored to the specific nature of this vulnerability.