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PatchSiren cyber security CVE debrief

CVE-2021-25297 Nagios CVE debrief

CVE-2021-25297 is a Nagios XI OS command injection vulnerability that CISA added to its Known Exploited Vulnerabilities catalog on 2022-01-18. Because it is listed in KEV, organizations should treat remediation as urgent and follow vendor update guidance without delay.

Vendor
Nagios
Product
Nagios XI
CVSS
HIGH 8.8
CISA KEV
Listed
Original CVE published
2022-01-18
Original CVE updated
2022-01-18
Advisory published
2022-01-18
Advisory updated
2022-01-18

Who should care

Nagios XI administrators, security teams, and asset owners responsible for exposed or business-critical Nagios deployments should prioritize this CVE, especially where patching is delayed or remediation tracking is incomplete.

Technical summary

The supplied source corpus identifies the issue as an OS command injection affecting Nagios XI. The available official references confirm the CVE record and that CISA considers it a known exploited vulnerability. No additional technical details, affected version ranges, or CVSS data are provided in the supplied corpus.

Defensive priority

High. CISA KEV inclusion indicates known exploitation and a time-sensitive remediation requirement. The KEV entry lists a due date of 2022-02-01, so affected environments should be reviewed and updated immediately if still unremediated.

Recommended defensive actions

  • Apply vendor-provided updates or mitigations for Nagios XI as instructed by the vendor.
  • Inventory all Nagios XI instances to confirm whether any deployed systems are affected.
  • Prioritize remediation for internet-facing or operationally critical monitoring servers.
  • Verify completion of patching and document the remediation status for vulnerability management tracking.

Evidence notes

CISA’s Known Exploited Vulnerabilities catalog entry names the issue as “Nagios XI OS Command Injection,” marks it as a known exploited vulnerability, and provides a required action to apply updates per vendor instructions. The CVE and NVD official records are included as authoritative reference links in the source corpus. The corpus does not provide CVSS metrics or affected-version detail.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-25297 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-25297

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2021-25297 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-25297

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.