FKIE_CVE-2026-20079
Vulnerability from fkie_nvd - Published: 2026-03-04 18:16 - Updated: 2026-09-16 17:17
Severity
Summary
A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to bypass authentication and execute script files on an affected device to obtain root access to the underlying operating system.
This vulnerability is due to an improper system process that is created at boot time. An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute a variety of scripts and commands that allow root access to the device.
References
| URL | Tags | ||
|---|---|---|---|
| psirt@cisco.com | https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-onprem-fmc-authbypass-5JPp45V2 | Vendor Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | http://seclists.org/fulldisclosure/2026/Aug/80 | Exploit, Mailing List, Third Party Advisory | |
| 134c704f-9b21-4f2e-91b3-4a467353bcc0 | https://blog.talosintelligence.com/fmc-ongoing-exploitation/ | Exploit, Third Party Advisory | |
| 134c704f-9b21-4f2e-91b3-4a467353bcc0 | https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20079 | US Government Resource |
Impacted products
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unknown",
"product": "Cisco Secure Firewall Management Center (FMC)",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "7.0.0"
},
{
"status": "affected",
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{
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{
"status": "affected",
"version": "7.1.0"
},
{
"status": "affected",
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{
"status": "affected",
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},
{
"status": "affected",
"version": "7.0.2"
},
{
"status": "affected",
"version": "7.2.0"
},
{
"status": "affected",
"version": "7.0.2.1"
},
{
"status": "affected",
"version": "7.0.3"
},
{
"status": "affected",
"version": "7.1.0.2"
},
{
"status": "affected",
"version": "7.2.0.1"
},
{
"status": "affected",
"version": "7.0.4"
},
{
"status": "affected",
"version": "7.2.1"
},
{
"status": "affected",
"version": "7.0.5"
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{
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"version": "7.3.0"
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{
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{
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"version": "7.3.1"
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{
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"version": "7.2.3"
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{
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"version": "7.1.0.3"
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{
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{
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{
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}
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"source": "psirt@cisco.com"
}
],
"cisaActionDue": "2026-09-12",
"cisaExploitAdd": "2026-09-09",
"cisaRequiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA\u2019s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA\u2019s \u201cForensics Triage Requirements\u201d (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset\u0027s internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
"cisaVulnerabilityName": "Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel Vulnerability",
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"matchCriteriaId": "DE58474E-D8D8-468D-9866-8C67607181E0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:7.6.2.1:*:*:*:*:*:*:*",
"matchCriteriaId": "29F91F5E-7049-400A-9C39-B20A639DD61D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:7.6.3:*:*:*:*:*:*:*",
"matchCriteriaId": "D71C054A-63FF-4858-A044-03FA72DA2C8D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:7.6.4:*:*:*:*:*:*:*",
"matchCriteriaId": "388E9714-FCB6-41DD-A5C4-19E73AF2FBCC",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:7.6.5:*:*:*:*:*:*:*",
"matchCriteriaId": "A38DA9B3-B3DB-4574-A23C-D7794E5E7A25",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:7.7.0:*:*:*:*:*:*:*",
"matchCriteriaId": "5BBDBCE8-CD5E-48BD-B61B-A36376C5A585",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:7.7.10:*:*:*:*:*:*:*",
"matchCriteriaId": "D098596D-8156-4130-9180-A48D2ECB0910",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:7.7.10.1:*:*:*:*:*:*:*",
"matchCriteriaId": "34649064-8BCE-4A61-BA3A-17CBC4690C7E",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:7.7.11:*:*:*:*:*:*:*",
"matchCriteriaId": "9CE3E9B1-4817-4734-9EE9-E16698D3F709",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:7.7.12:*:*:*:*:*:*:*",
"matchCriteriaId": "AD7FFF13-B4DA-43AA-9A52-B2B6775A702C",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:10.0.0:*:*:*:*:*:*:*",
"matchCriteriaId": "05AE4609-A851-4B64-8506-117B0F92F7A9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:10.0.1:*:*:*:*:*:*:*",
"matchCriteriaId": "B676D865-367C-45B6-9A81-224914E0DE67",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to bypass authentication and execute script files on an affected device to obtain root access to the underlying operating system.\u0026nbsp;\r\n\r\nThis vulnerability is due to an improper system process that is created at boot time. An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute a variety of scripts and commands that allow\u0026nbsp;root access to the device.\u0026nbsp;"
},
{
"lang": "es",
"value": "Una vulnerabilidad en la interfaz web de Cisco Secure Firewall Management Center (FMC) Software podr\u00eda permitir a un atacante remoto no autenticado eludir la autenticaci\u00f3n y ejecutar archivos de script en un dispositivo afectado para obtener acceso de root al sistema operativo subyacente. Esta vulnerabilidad se debe a un proceso de sistema inadecuado que se crea al iniciar. Un atacante podr\u00eda explotar esta vulnerabilidad enviando solicitudes HTTP manipuladas a un dispositivo afectado. Un exploit exitoso podr\u00eda permitir al atacante ejecutar una variedad de scripts y comandos que permiten acceso de root al dispositivo."
}
],
"id": "CVE-2026-20079",
"lastModified": "2026-09-16T17:17:16.340",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 10.0,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 6.0,
"source": "psirt@cisco.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-20079",
"options": [
{
"exploitation": "active"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-10T03:55:16.679381Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-03-04T18:16:24.230",
"references": [
{
"source": "psirt@cisco.com",
"tags": [
"Vendor Advisory"
],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-onprem-fmc-authbypass-5JPp45V2"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Mailing List",
"Third Party Advisory"
],
"url": "http://seclists.org/fulldisclosure/2026/Aug/80"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"tags": [
"Exploit",
"Third Party Advisory"
],
"url": "https://blog.talosintelligence.com/fmc-ongoing-exploitation/"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"tags": [
"US Government Resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20079"
}
],
"sourceIdentifier": "psirt@cisco.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-288"
}
],
"source": "psirt@cisco.com",
"type": "Secondary"
}
]
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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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.
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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.