CVE-2026-28715
📋 TL;DR
CVE-2026-28715 is an improper authorization vulnerability in Acronis Cyber Protect 17 that allows unauthorized access to sensitive information. Attackers can exploit this to view protected data without proper credentials. All users running affected versions of Acronis Cyber Protect 17 on Linux or Windows are impacted.
💻 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 compromise of sensitive backup data, configuration files, and credentials stored in Acronis Cyber Protect, potentially leading to data theft, ransomware deployment, or lateral movement.
Likely Case
Unauthorized access to backup metadata, configuration details, and potentially some protected data, enabling reconnaissance and targeted attacks.
If Mitigated
Limited information disclosure if network segmentation and strict access controls are implemented, though vulnerability remains present.
🎯 Exploit Status
Exploitation requires some level of access but authorization bypass makes it relatively straightforward once initial access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Build 41186 or later
Vendor Advisory: https://security-advisory.acronis.com/advisories/SEC-5910
Restart Required: Yes
Instructions:
1. Download Acronis Cyber Protect 17 build 41186 or later from official Acronis portal. 2. Backup current configuration. 3. Install update following vendor documentation. 4. Restart affected services. 5. Verify successful update.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Acronis Cyber Protect management interfaces
Use firewall rules to limit access to trusted IPs only
Access Control Hardening
allImplement strict authentication requirements and least privilege access
Configure role-based access controls and multi-factor authentication where available
🧯 If You Can't Patch
- Implement network segmentation to isolate Acronis Cyber Protect from untrusted networks
- Enable detailed logging and monitoring for unauthorized access attempts to sensitive endpoints
🔍 How to Verify
Check if Vulnerable:
Check Acronis Cyber Protect version in management console or via command line: On Windows: Check program version in Control Panel. On Linux: Check installed package version.Check Version:
Windows: Check Add/Remove Programs. Linux: rpm -qa | grep acronis or dpkg -l | grep acronisVerify Fix Applied:
Verify version is 41186 or later in Acronis management interface and test authorization controls on sensitive endpoints.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to sensitive endpoints
- Failed authorization checks followed by successful data access
- Unusual patterns of data retrieval from backup repositories
Network Indicators:
- Unusual traffic to Acronis management ports from unauthorized sources
- Data exfiltration patterns from backup storage
SIEM Query:
source="acronis" AND (event_type="access_denied" OR event_type="unauthorized_access") AND resource="sensitive_data"