CVE-2026-22624
📋 TL;DR
This vulnerability allows authenticated users of certain HIKSEMI NAS products to access and manipulate other users' files without proper authorization. It affects organizations using vulnerable HIKSEMI NAS devices where multiple users share storage resources. The issue stems from inadequate access control mechanisms.
💻 Affected Systems
- HIKSEMI NAS products (specific models not detailed in reference)
⚠️ 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
Malicious authenticated users could delete, modify, or exfiltrate sensitive files belonging to other users, potentially causing data loss, compliance violations, or intellectual property theft.
Likely Case
Accidental or intentional unauthorized access to other users' files, leading to data privacy violations and potential internal conflicts.
If Mitigated
Limited impact with proper user access controls, auditing, and network segmentation in place.
🎯 Exploit Status
Exploitation requires valid user credentials. The vulnerability appears to be an access control bypass within the file management interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown - Check vendor advisory for specific patched versions
Vendor Advisory: https://www.hiksemitech.com/en/hiksemi/support/security-advisory.html
Restart Required: Yes
Instructions:
1. Visit the vendor security advisory page. 2. Identify affected product models and versions. 3. Download and apply the latest firmware update. 4. Restart the NAS device. 5. Verify the update was successful.
🔧 Temporary Workarounds
Restrict User Permissions
allConfigure strict file and folder permissions to limit user access to only necessary resources
Implement Network Segmentation
allIsolate NAS devices from general network access and restrict to specific VLANs or subnets
🧯 If You Can't Patch
- Implement strict access control lists (ACLs) and regularly audit file access permissions
- Enable detailed logging of all file access attempts and monitor for unauthorized activities
🔍 How to Verify
Check if Vulnerable:
Check firmware version against vendor advisory. Test if authenticated users can access files/folders belonging to other user accounts.Check Version:
Check NAS web interface or CLI for firmware version (vendor-specific command)Verify Fix Applied:
After patching, verify that authenticated users can only access their own assigned files and folders as per configured permissions.📡 Detection & Monitoring
Log Indicators:
- Unauthorized file access attempts
- User accessing files outside their permission scope
- Multiple failed permission checks
Network Indicators:
- Unusual file transfer patterns between user accounts
- SMB/NFS access to unauthorized shares
SIEM Query:
source="nas_logs" AND (event_type="file_access" AND user!=file_owner) OR (permission_denied AND retry_success)