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CVE-2026-28710 is a high-severity vulnerability residing in Acronis Cyber Protect 17, impacting both Linux and Windows platforms prior to build 41186 . The core issue is classified under CWE-1390, which denotes a “Weak Authentication” mechanism . This weakness stems from an improper authentication process within the application, creating a pathway for attackers to bypass standard security checks . The vulnerability is network-attackable, meaning an adversary does not need local access to the system . Critically, the attack complexity is high, and it requires no privileges or user interaction to execute . If successfully exploited, the confidentiality, integrity, and availability impacts are all rated as high . This allows an unauthenticated, remote attacker to potentially disclose sensitive information, manipulate critical data, or disrupt services provided by the Cyber Protect software . The attack vector is network-based, and the scope of the impact remains unchanged, directly affecting the vulnerable component . The vendor, Acronis International GmbH, has assigned this a CVSS base score of 8.1, signifying a major risk for unpatched systems . The vulnerability was reserved on March 3, 2026, and published shortly after on March 5, 2026 . Administrators are urged to consult the official Acronis advisory, SEC-9137, for mitigation steps .
dailycve form:
Platform: Acronis Cyber Protect
Version: 17 below 41186
Vulnerability : Weak Authentication
Severity: High (CVSS 8.1)
date: March 5, 2026
Prediction: Patch exists (build 41186)
What Undercode Say:
Analytics:
The vulnerability is present in all installations of Acronis Cyber Protect 17 on Linux and Windows that are running a version older than build 41186 . The high CVSS score of 8.1, combined with a network attack vector and no requirement for privileges or user interaction, makes this a particularly dangerous flaw despite its high attack complexity . Security teams should prioritize identifying assets running this software, as the vulnerability allows for a complete compromise of confidentiality, integrity, and availability .
Exploit:
While no public proof-of-concept is mentioned in the provided data, an attacker would likely target the authentication mechanism over the network. The goal would be to send specially crafted requests to bypass authentication checks, allowing the attacker to interact with the software’s backend as if they were a legitimate, privileged user . This could involve exploiting API endpoints or management interfaces that fail to properly verify a user’s identity.
Example of checking the installed version on a Linux system (paths may vary) sudo /usr/bin/acronis/cyber_product_version --show Example of checking the installed version in Windows Registry (via PowerShell) Get-ItemProperty -Path "HKLM:\SOFTWARE\Acronis\CyberProtect" -Name "ProductVersion"
Protection from this CVE:
The primary and most effective protection is to update Acronis Cyber Protect 17 to the latest build, specifically version 41186 or later . This fixed version is available for both Linux and Windows platforms.
General update command for Linux (if using package manager, adjust accordingly) sudo apt-get update && sudo apt-get upgrade acronis-cyber-protect Example of checking the current running build via command line acronis-cyber-protect-cli --version
As a defense-in-depth measure, network segmentation should be considered. Restrict network access to the Acronis management interfaces, ensuring they are only accessible from trusted administrative networks or jump boxes. This limits the potential attack surface.
Impact:
Successful exploitation of CVE-2026-28710 has severe consequences . An attacker could gain unauthorized access to the Acronis Cyber Protect console, leading to:
Confidentiality Breach (C:H): Exposure of sensitive data stored or managed by the software, including backups, system images, and credentials.
Integrity Violation (I:H): Manipulation or corruption of backup data, system configurations, or security policies, rendering the protection solution unreliable.
Availability Disruption (A:H): Potential denial of service by disabling protection features, deleting critical recovery points, or crashing the application itself. This could render systems unable to recover from a real disaster or ransomware attack .
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Sources:
Reported By: nvd.nist.gov
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