CVE-2021-25296
Published: January 18, 2022
Official Description
Nagios XI contains a vulnerability which can lead to OS command injection on the Nagios XI server.
CISA KEV Advisory
Nagios XI OS Command Injection
Nagios XI contains a vulnerability which can lead to OS command injection on the Nagios XI server.
Apply updates per vendor instructions.
Risk Analysis
Nagios XI contains a vulnerability that can lead to OS command injection on the Nagios XI server. With an EPSS score of 0.93557 and inclusion in CISA's KEV, this vulnerability is highly likely to be exploited and is actively targeted.
This vulnerability has been observed under active exploitation in the wild. The flaw is remotely exploitable, allowing OS command injection.
Apply the latest security patches and updates for Nagios XI. Implement strong input validation and sanitize all user-supplied data.
Technical Analysis
CVE-2021-25296 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-2021-25296 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-2021-25296 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