CVE-2020-5849: Unraid authentication bypass in version 6.8.0

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 17 September 2026. Confidence: medium.

critical priorityIt is in CISA KEV with a very high EPSS score and public exploit code, and the flaw allows unauthenticated remote access that can lead to root code execution.

What it is

Unraid 6.8.0 contains an authentication bypass (CWE-697, incorrect comparison) that lets an unauthenticated remote party get past login checks. The record is thin: it names only version 6.8.0 and gives no detail on the comparison logic or the affected component. Because Unraid is a NAS and storage management platform, bypassing authentication exposes the management interface and the data behind it.

Impact

An attacker gains access to the Unraid management interface without valid credentials, which the linked research describes as leading to arbitrary code execution as root. At minimum, the CVSS vector indicates a high confidentiality impact.

Attack surface

Reachable over the network with no authentication and no user interaction (AV:N/AC:L/PR:N/UI:N). Any internet- or LAN-exposed Unraid 6.8.0 web interface is in scope; the record does not specify which endpoint or parameter is at fault.

Exploitation

Listed in CISA KEV since 2021-11-03 with a 2022-05-03 remediation due date, and EPSS is 0.93243 (99.8th percentile). Public exploit code is referenced (Packet Storm, Sysdream), so exploitation is both proven and likely.

What to do

• Upgrade Unraid to a version later than 6.8.0 per the vendor announcement; patch first.
• If immediate upgrade is not possible, remove the Unraid web interface from internet exposure and restrict it to a trusted management network.
• Enforce firewall rules or a reverse proxy with authentication in front of the Unraid UI.
• Rotate credentials and review accounts for signs of unauthorized administrative access.
• Monitor vendor announcements for the specific fixed release, since the record does not name one.

Detection

• Review Unraid web server and authentication logs for successful logins or admin actions from unexpected source IPs.
• Alert on access to the Unraid management interface from outside the expected management network.
• Hunt for unexpected processes, cron entries, or shell activity on Unraid hosts consistent with post-exploitation.
• Correlate Unraid host telemetry with outbound connections to unfamiliar destinations.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.