CVE-2021-25296 (GCVE-0-2021-25296)
Vulnerability from cvelistv5 – Published: 2021-02-15 00:00 – Updated: 2026-07-09 00:12Summary
Nagios XI version xi-5.7.5 is affected by OS command injection. The vulnerability exists in the file /usr/local/nagiosxi/html/includes/configwizards/windowswmi/windowswmi.inc.php due to improper sanitization of authenticated user-controlled input by a single HTTP request, which can lead to OS command injection on the Nagios XI server.
Severity
8.8 (High)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-04 20:17 UTC
Assigner
References
6 references
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 3f41d26a-7398-4bdc-9b3c-7898abc2dc13
Exploited: Yes
Timestamps
First Seen: 2022-01-18
Asserted: 2022-01-18
Scope
Notes: KEV entry: Nagios XI OS Command Injection | Affected: Nagios / Nagios XI | Description: Nagios XI contains a vulnerability which can lead to OS command injection on the Nagios XI server. | Required action: Apply updates per vendor instructions. | Due date: 2022-02-01 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-25296
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-78 CWE-138 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Nagios XI |
| Due Date | 2022-02-01 |
| Date Added | 2022-01-18 |
| Vendorproject | Nagios |
| Vulnerabilityname | Nagios XI OS Command Injection |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-02-02 13:25 UTC
| Updated: 2026-02-06 07:53 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: e3d40f7b-6fe2-4010-8369-5cd27d0e7a44
Exploited: Yes
Timestamps
First Seen: 2022-01-18
Asserted: 2022-01-18
Scope
Notes: KEVIntel entry: Nagios XI version xi-5.7.5 is affected by OS command injection. The vulnerability exists in the file... | Affected: Nagios / Nagios XI | CVSS: 8.8 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | Nagios XI version xi-5.7.5 is affected by OS command injection. The vulnerability exists in the file... |
| Vendor | Nagios |
| Product | Nagios XI |
| Added Date | 2022-01-18T00:00:00.000Z |
| Cvss Score | 8.8 |
| Epss Score | None |
| Cvss Severity | HIGH |
| Epss Percentile | None |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-23 11:13 UTC
| Updated: 2026-06-23 11:13 UTC
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-07-09T00:12:24.420Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://assets.nagios.com/downloads/nagiosxi/versions.php"
},
{
"tags": [
"x_transferred"
],
"url": "https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md"
},
{
"tags": [
"x_transferred"
],
"url": "http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html"
},
{
"tags": [
"x_transferred"
],
"url": "http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.fastly.com/blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-and"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2021-25296",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-02-04T20:17:13.052541Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2022-01-18",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25296"
},
"type": "kev"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-noinfo Not enough information",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-10-21T23:35:27.410Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25296"
}
],
"timeline": [
{
"lang": "en",
"time": "2022-01-18T00:00:00.000Z",
"value": "CVE-2021-25296 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Nagios XI version xi-5.7.5 is affected by OS command injection. The vulnerability exists in the file /usr/local/nagiosxi/html/includes/configwizards/windowswmi/windowswmi.inc.php due to improper sanitization of authenticated user-controlled input by a single HTTP request, which can lead to OS command injection on the Nagios XI server."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "n/a",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-05T00:12:47.455Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"url": "https://assets.nagios.com/downloads/nagiosxi/versions.php"
},
{
"url": "https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md"
},
{
"url": "http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html"
},
{
"url": "http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html"
},
{
"url": "https://www.fastly.com/blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-and"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2021-25296",
"datePublished": "2021-02-15T00:00:00.000Z",
"dateReserved": "2021-01-18T00:00:00.000Z",
"dateUpdated": "2026-07-09T00:12:24.420Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"cisa_known_exploited": {
"cveID": "CVE-2021-25296",
"cwes": [
"CWE-78",
"CWE-138"
],
"dateAdded": "2022-01-18",
"dueDate": "2022-02-01",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://nvd.nist.gov/vuln/detail/CVE-2021-25296",
"product": "Nagios XI",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "Nagios XI contains a vulnerability which can lead to OS command injection on the Nagios XI server.",
"vendorProject": "Nagios",
"vulnerabilityName": "Nagios XI OS Command Injection"
},
"epss": {
"cve": "CVE-2021-25296",
"date": "2026-09-20",
"epss": "0.72182",
"percentile": "0.99406"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"source": "cve@mitre.org"
}
],
"cisaActionDue": "2022-02-01",
"cisaExploitAdd": "2022-01-18",
"cisaRequiredAction": "Apply updates per vendor instructions.",
"cisaVulnerabilityName": "Nagios XI OS Command Injection",
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*",
"matchCriteriaId": "F16363BB-D503-4020-A9FA-D78B0ABE217C",
"versionEndIncluding": "5.7.5",
"versionStartIncluding": "5.5.6",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Nagios XI version xi-5.7.5 is affected by OS command injection. The vulnerability exists in the file /usr/local/nagiosxi/html/includes/configwizards/windowswmi/windowswmi.inc.php due to improper sanitization of authenticated user-controlled input by a single HTTP request, which can lead to OS command injection on the Nagios XI server."
},
{
"lang": "es",
"value": "Nagios XI versi\u00f3n xi-5.7.5, esta afectada por una inyecci\u00f3n de comandos del Sistema Operativo.\u0026#xa0;La vulnerabilidad se presenta en el archivo /usr/local/nagiosxi/html/includes/configwizards/windowswmi/windowswmi.inc.php debido a un saneamiento inapropiado de la entrada controlada por el usuario autenticado mediante una \u00fanica petici\u00f3n HTTP, que puede conllevar a una inyecci\u00f3n de comandos del el servidor de Nagios XI"
}
],
"id": "CVE-2021-25296",
"lastModified": "2026-07-09T13:39:49.130",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "SINGLE",
"availabilityImpact": "COMPLETE",
"baseScore": 9.0,
"confidentialityImpact": "COMPLETE",
"integrityImpact": "COMPLETE",
"vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
"version": "2.0"
},
"exploitabilityScore": 8.0,
"impactScore": 10.0,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 5.9,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2021-25296",
"options": [
{
"exploitation": "active"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-02-04T20:17:13.052541Z",
"version": "2.0.3"
}
}
]
},
"published": "2021-02-15T13:15:12.683",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Exploit",
"Third Party Advisory",
"VDB Entry"
],
"url": "http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Product"
],
"url": "https://assets.nagios.com/downloads/nagiosxi/versions.php"
},
{
"source": "cve@mitre.org",
"tags": [
"Exploit",
"Third Party Advisory"
],
"url": "https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md"
},
{
"source": "cve@mitre.org",
"tags": [
"Exploit",
"Third Party Advisory"
],
"url": "https://www.fastly.com/blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-and"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Third Party Advisory",
"VDB Entry"
],
"url": "http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Product"
],
"url": "https://assets.nagios.com/downloads/nagiosxi/versions.php"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Third Party Advisory"
],
"url": "https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Third Party Advisory"
],
"url": "https://www.fastly.com/blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-and"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"tags": [
"US Government Resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25296"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-07-09T00:12:24.420Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://assets.nagios.com/downloads/nagiosxi/versions.php"
},
{
"tags": [
"x_transferred"
],
"url": "https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md"
},
{
"tags": [
"x_transferred"
],
"url": "http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html"
},
{
"tags": [
"x_transferred"
],
"url": "http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.fastly.com/blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-and"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2021-25296",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-02-04T20:17:13.052541Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2022-01-18",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25296"
},
"type": "kev"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-noinfo Not enough information",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-02-04T20:17:00.452Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25296"
}
],
"timeline": [
{
"lang": "en",
"time": "2022-01-18T00:00:00.000Z",
"value": "CVE-2021-25296 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Nagios XI version xi-5.7.5 is affected by OS command injection. The vulnerability exists in the file /usr/local/nagiosxi/html/includes/configwizards/windowswmi/windowswmi.inc.php due to improper sanitization of authenticated user-controlled input by a single HTTP request, which can lead to OS command injection on the Nagios XI server."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "n/a",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-05T00:12:47.455Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"url": "https://assets.nagios.com/downloads/nagiosxi/versions.php"
},
{
"url": "https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md"
},
{
"url": "http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html"
},
{
"url": "http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html"
},
{
"url": "https://www.fastly.com/blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-and"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2021-25296",
"datePublished": "2021-02-15T00:00:00.000Z",
"dateReserved": "2021-01-18T00:00:00.000Z",
"dateUpdated": "2026-07-09T00:12:24.420Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…