CVE-2020-5849
Published: November 3, 2021
Official Description
Unraid contains an authentication bypass vulnerability that allows attackers to gain access to the administrative interface. This CVE is chainable with CVE-2020-5847 for remote code execution.
CISA KEV Advisory
Unraid Authentication Bypass Vulnerability
Unraid contains an authentication bypass vulnerability that allows attackers to gain access to the administrative interface. This CVE is chainable with CVE-2020-5847 for remote code execution.
Apply updates per vendor instructions.
Risk Analysis
An authentication bypass vulnerability in Unraid allows attackers to gain access to the administrative interface. This flaw is particularly dangerous as it can be chained with CVE-2020-5847 to achieve remote code execution. The high EPSS score of 0.93763 and its inclusion in the KEV catalog signify a high probability of exploitation and confirmed active attacks.
This vulnerability has been actively exploited in the wild and is listed in CISA's Known Exploited Vulnerabilities catalog. It is chainable with another CVE for remote code execution.
Administrators should apply all available security updates for Unraid to patch this authentication bypass. Implement strong authentication policies and network segmentation to limit exposure.
Technical Analysis
CVE-2020-5849 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2020-5849 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-5849 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1