Exploitation evidence
Known exploited · CISA KEV listed
Added 2026-03-19. Ransomware campaign use: Known.
CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA due date: 2026-03-22. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
Cisco / Cisco Secure Firewall Management Center (FMC)
Default status: unknown
- affected: 7.0.0
- affected: 7.0.0.1
- affected: 7.0.1
- affected: 7.1.0
- affected: 6.4.0.13
- affected: 7.0.1.1
- affected: 6.4.0.14
- affected: 7.1.0.1
- affected: 7.0.2
- affected: 6.4.0.15
- affected: 7.2.0
- affected: 7.0.2.1
- affected: 7.0.3
- affected: 7.1.0.2
- affected: 7.2.0.1
- affected: 7.0.4
- affected: 7.2.1
- affected: 7.0.5
- affected: 6.4.0.16
- affected: 7.3.0
- affected: 7.2.2
- affected: 7.3.1
- affected: 7.2.3
- affected: 7.1.0.3
- affected: 7.2.3.1
- affected: 7.2.4
- affected: 7.0.6
- affected: 7.2.4.1
- affected: 7.2.5
- affected: 7.3.1.1
- affected: 7.4.0
- affected: 6.4.0.17
- affected: 7.0.6.1
- affected: 7.2.5.1
- affected: 7.4.1
- affected: 7.2.6
- affected: 7.4.1.1
- affected: 7.0.6.2
- affected: 6.4.0.18
- affected: 7.2.7
- affected: 7.2.5.2
- affected: 7.3.1.2
- affected: 7.2.8
- affected: 7.6.0
- affected: 7.4.2
- affected: 7.2.8.1
- affected: 7.0.6.3
- affected: 7.4.2.1
- affected: 7.2.9
- affected: 7.0.7
- affected: 7.7.0
- affected: 7.4.2.2
- affected: 7.2.10
- affected: 7.6.1
- affected: 7.4.2.3
- affected: 7.0.8
- affected: 7.6.2
- affected: 7.7.10
- affected: 7.2.10.1
- affected: 7.0.8.1
- affected: 7.6.2.1
- affected: 7.2.10.2
- affected: 7.7.10.1
- affected: 7.4.2.4
- affected: 7.4.3
- affected: 7.7.11
- affected: 7.6.4
- affected: 10.0.0
- affected: 7.4.4
- affected: 7.4.5
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
CVE Program record ↗ · Download tracked evidence as JSON
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-rce-NKhnULJh
- https://aws.amazon.com/blogs/security/amazon-threat-intelligence-teams-identify-interlock-ransomware-campaign-targeting-enterprise-firewalls/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20131
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.44431,
"percentile": 0.98782
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.44431,
"percentile": 0.98774
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.44431,
"percentile": 0.98772
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.44431,
"percentile": 0.98771
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.44431,
"percentile": 0.9877
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.44431,
"percentile": 0.98769
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.44431,
"percentile": 0.98768
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.44431,
"percentile": 0.98767
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.44431,
"percentile": 0.98765
}03 Nov 2026, 12:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-20131",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-04T00:00:00+00:00",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2026-03-19",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20131"
},
"type": "kev"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-14T03:55:24.856Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"third-party-advisory"
],
"url": "https://aws.amazon.com/blogs/security/amazon-threat-intelligence-teams-identify-interlock-ransomware-campaign-targeting-enterprise-firewalls/"
},
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20131"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-03-19T00:00:00.000Z",
"value": "CVE-2026-20131 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Cisco Secure Firewall Management Center (FMC)",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "7.0.0"
},
{
"status": "affected",
"version": "7.0.0.1"
},
{
"status": "affected",
"version": "7.0.1"
},
{
"status": "affected",
"version": "7.1.0"
},
{
"status": "affected",
"version": "6.4.0.13"
},
{
"status": "affected",
"version": "7.0.1.1"
},
{
"status": "affected",
"version": "6.4.0.14"
},
{
"status": "affected",
"version": "7.1.0.1"
},
{
"status": "affected",
"version": "7.0.2"
},
{
"status": "affected",
"version": "6.4.0.15"
},
{
"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"
},
{
"status": "affected",
"version": "6.4.0.16"
},
{
"status": "affected",
"version": "7.3.0"
},
{
"status": "affected",
"version": "7.2.2"
},
{
"status": "affected",
"version": "7.3.1"
},
{
"status": "affected",
"version": "7.2.3"
},
{
"status": "affected",
"version": "7.1.0.3"
},
{
"status": "affected",
"version": "7.2.3.1"
},
{
"status": "affected",
"version": "7.2.4"
},
{
"status": "affected",
"version": "7.0.6"
},
{
"status": "affected",
"version": "7.2.4.1"
},
{
"status": "affected",
"version": "7.2.5"
},
{
"status": "affected",
"version": "7.3.1.1"
},
{
"status": "affected",
"version": "7.4.0"
},
{
"status": "affected",
"version": "6.4.0.17"
},
{
"status": "affected",
"version": "7.0.6.1"
},
{
"status": "affected",
"version": "7.2.5.1"
},
{
"status": "affected",
"version": "7.4.1"
},
{
"status": "affected",
"version": "7.2.6"
},
{
"status": "affected",
"version": "7.4.1.1"
},
{
"status": "affected",
"version": "7.0.6.2"
},
{
"status": "affected",
"version": "6.4.0.18"
},
{
"status": "affected",
"version": "7.2.7"
},
{
"status": "affected",
"version": "7.2.5.2"
},
{
"status": "affected",
"version": "7.3.1.2"
},
{
"status": "affected",
"version": "7.2.8"
},
{
"status": "affected",
"version": "7.6.0"
},
{
"status": "affected",
"version": "7.4.2"
},
{
"status": "affected",
"version": "7.2.8.1"
},
{
"status": "affected",
"version": "7.0.6.3"
},
{
"status": "affected",
"version": "7.4.2.1"
},
{
"status": "affected",
"version": "7.2.9"
},
{
"status": "affected",
"version": "7.0.7"
},
{
"status": "affected",
"version": "7.7.0"
},
{
"status": "affected",
"version": "7.4.2.2"
},
{
"status": "affected",
"version": "7.2.10"
},
{
"status": "affected",
"version": "7.6.1"
},
{
"status": "affected",
"version": "7.4.2.3"
},
{
"status": "affected",
"version": "7.0.8"
},
{
"status": "affected",
"version": "7.6.2"
},
{
"status": "affected",
"version": "7.7.10"
},
{
"status": "affected",
"version": "7.2.10.1"
},
{
"status": "affected",
"version": "7.0.8.1"
},
{
"status": "affected",
"version": "7.6.2.1"
},
{
"status": "affected",
"version": "7.2.10.2"
},
{
"status": "affected",
"version": "7.7.10.1"
},
{
"status": "affected",
"version": "7.4.2.4"
},
{
"status": "affected",
"version": "7.4.3"
},
{
"status": "affected",
"version": "7.7.11"
},
{
"status": "affected",
"version": "7.6.4"
},
{
"status": "affected",
"version": "10.0.0"
},
{
"status": "affected",
"version": "7.4.4"
},
{
"status": "affected",
"version": "7.4.5"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to execute arbitrary Java code as root on an affected device.\r\n\r\nThis vulnerability is due to insecure deserialization of a user-supplied Java byte stream. An attacker could exploit this vulnerability by sending a crafted serialized Java object to the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the device and elevate privileges to root.\r\nNote: If the FMC management interface does not have public internet access, the attack surface that is associated with this vulnerability is reduced."
}
],
"exploits": [
{
"lang": "en",
"value": "In March 2026, the Cisco Product Security Incident Response Team (PSIRT) became aware of attempted exploitation of this vulnerability. Cisco continues to strongly recommend that customers upgrade to a fixed software release to remediate this vulnerability."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 10,
"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"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-502",
"description": "Deserialization of Untrusted Data",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-25T16:04:35.907Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-fmc-rce-NKhnULJh",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-rce-NKhnULJh"
}
],
"source": {
"advisory": "cisco-sa-fmc-rce-NKhnULJh",
"defects": [
"CSCwt14636"
],
"discovery": "INTERNAL"
},
"title": "Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-20131",
"datePublished": "2026-03-04T17:17:56.008Z",
"dateReserved": "2025-10-08T11:59:15.380Z",
"dateUpdated": "2026-08-14T03:55:24.856Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.44431,
"percentile": 0.98764
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2026-20131",
"cwes": [
"CWE-502"
],
"dateAdded": "2026-03-19",
"dueDate": "2026-03-22",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Known",
"notes": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-rce-NKhnULJh ; https://nvd.nist.gov/vuln/detail/CVE-2026-20131",
"product": "Secure Firewall Management Center (FMC)",
"requiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
"shortDescription": "Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management contain a deserialization of untrusted data vulnerability in the web-based management interface that could allow an unauthenticated, remote attacker to execute arbitrary Java code as root on an affected device.",
"vendorProject": "Cisco",
"vulnerabilityName": "Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data Vulnerability"
}