CVE-2021-25298
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 is vulnerable to OS command injection, allowing an attacker to execute arbitrary commands on the Nagios XI server. The high EPSS score of 0.79760 indicates a high likelihood of exploitation, and its inclusion in CISA's KEV confirms active exploitation.
Active exploitation of this vulnerability has been observed in the wild, as confirmed by its presence in CISA's KEV. This vulnerability is remotely exploitable.
Apply the latest security patches and updates for Nagios XI immediately. Implement network segmentation and restrict access to the Nagios XI server to authorized personnel only.
Technical Analysis
CVE-2021-25298 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-2021-25298 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-2021-25298 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