CVE-2026-28710
📋 TL;DR
CVE-2026-28710 allows attackers to access and manipulate sensitive information in Acronis Cyber Protect 17 due to improper authentication. This affects all Acronis Cyber Protect 17 installations on Linux and Windows systems before build 41186. The vulnerability could lead to unauthorized data exposure and system compromise.
💻 Affected Systems
- Acronis Cyber Protect 17
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with unauthorized access to all protected data, configuration manipulation, and potential lateral movement to other systems.
Likely Case
Unauthorized access to sensitive backup data, configuration files, and system information leading to data theft or manipulation.
If Mitigated
Limited impact with proper network segmentation and access controls, but still potential for information disclosure.
🎯 Exploit Status
The vulnerability involves improper authentication, suggesting relatively straightforward exploitation once details are known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Build 41186 or later
Vendor Advisory: https://security-advisory.acronis.com/advisories/SEC-9137
Restart Required: Yes
Instructions:
1. Download the latest version from Acronis official website. 2. Run the installer to update to build 41186 or later. 3. Restart the Acronis Cyber Protect service. 4. Verify the update was successful.
🔧 Temporary Workarounds
Network Isolation
allRestrict network access to Acronis Cyber Protect to only trusted management networks
Use firewall rules to block external access to Acronis ports (typically 9876, 443)
Access Control Hardening
allImplement strict access controls and multi-factor authentication for management interfaces
Configure network ACLs and enable MFA if supported
🧯 If You Can't Patch
- Isolate the Acronis server from internet and untrusted networks
- Implement strict network segmentation and monitor for unusual access patterns
🔍 How to Verify
Check if Vulnerable:
Check the Acronis Cyber Protect version in the management console or via command line. If version is earlier than build 41186, the system is vulnerable.Check Version:
On Windows: 'acronis_cyber_protect --version' or check in GUI. On Linux: '/opt/acronis/cyberprotection/bin/acronis_cyber_protect --version'Verify Fix Applied:
Verify the version shows build 41186 or later in the management console or via version check command.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to Acronis services
- Unusual authentication patterns
- Configuration changes without proper authorization
Network Indicators:
- Unexpected connections to Acronis management ports (9876, 443) from untrusted sources
- Unusual data transfers from Acronis server
SIEM Query:
source="acronis*" AND (event_type="authentication_failure" OR event_type="unauthorized_access")