CVE-2025-30412
📋 TL;DR
CVE-2025-30412 allows attackers to bypass authentication mechanisms in Acronis Cyber Protect, potentially leading to unauthorized access, sensitive data disclosure, and system manipulation. This affects Acronis Cyber Protect 16 (Linux/Windows) before build 39938 and Acronis Cyber Protect 15 (Linux/Windows) before build 41800. Organizations using these vulnerable versions are at risk of complete system compromise.
💻 Affected Systems
- Acronis Cyber Protect 16
- Acronis Cyber Protect 15
⚠️ 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 takeover with administrative privileges, allowing attackers to exfiltrate all protected data, manipulate backup integrity, deploy ransomware, and maintain persistent access to the entire infrastructure.
Likely Case
Unauthorized access to sensitive backup data, potential credential theft, manipulation of backup schedules and retention policies, and lateral movement within the network.
If Mitigated
Limited impact with proper network segmentation, strong authentication controls, and monitoring, though the vulnerability still presents significant risk if exploited.
🎯 Exploit Status
The CWE-1390 classification suggests weak authentication mechanisms that could be exploited without prior authentication. Given the CVSS 10.0 score, exploitation is likely straightforward once details are known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Cyber Protect 16: build 39938 or later; Cyber Protect 15: build 41800 or later
Vendor Advisory: https://security-advisory.acronis.com/advisories/SEC-8598
Restart Required: Yes
Instructions:
1. Download the latest build from Acronis support portal. 2. Backup current configuration. 3. Stop all Acronis services. 4. Install the update. 5. Restart services and verify functionality.
🔧 Temporary Workarounds
Network Isolation
allRestrict network access to Acronis management interfaces to trusted IP addresses only
# Use firewall rules to restrict access
# Example for Linux iptables:
iptables -A INPUT -p tcp --dport 9877 -s trusted_ip_range -j ACCEPT
iptables -A INPUT -p tcp --dport 9877 -j DROP
Enhanced Authentication
allImplement multi-factor authentication and strong password policies for all Acronis accounts
# Configure in Acronis management console:
# 1. Navigate to Settings > Security
# 2. Enable MFA for all accounts
# 3. Set minimum password length to 12 characters
# 4. Enable account lockout after 5 failed attempts
🧯 If You Can't Patch
- Isolate affected systems in a dedicated VLAN with strict firewall rules
- Implement comprehensive monitoring and alerting for authentication attempts and data access patterns
🔍 How to Verify
Check if Vulnerable:
Check the build number in Acronis management console under Help > About. For Cyber Protect 16, vulnerable if build < 39938. For Cyber Protect 15, vulnerable if build < 41800.Check Version:
# Windows: Check registry or installed programs
# Linux: Check package version or run acronis-cli --versionVerify Fix Applied:
Verify build number meets minimum requirements and test authentication mechanisms. Attempt to access management interface with invalid credentials should be properly rejected.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts from unexpected IPs
- Successful logins outside business hours
- Multiple authentication attempts in short timeframes
- Access to sensitive backup data without proper authorization
Network Indicators:
- Unusual traffic patterns to Acronis management ports (default 9877)
- Authentication requests from external IPs
- Large data transfers from backup repositories
SIEM Query:
source="acronis*" AND (event_type="authentication_failure" OR event_type="unauthorized_access") | stats count by src_ip, user