Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability
Published Mar 4, 2026 ·Due Mar 22, 2026
10.0
CRITICALCVSS 3.1
EPSS 42.66%
Description
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. This 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. Note: If the FMC management interface does not have public internet access, the attack surface that is associated with this vulnerability is reduced.
Affected products
-
- Version 10.0.0StatusaffectedConstraints-
- Version 6.4.0.13StatusaffectedConstraints-
- Version 6.4.0.14StatusaffectedConstraints-
- Version 6.4.0.15StatusaffectedConstraints-
- Version 6.4.0.16StatusaffectedConstraints-
- Version 6.4.0.17StatusaffectedConstraints-
- Version 6.4.0.18StatusaffectedConstraints-
- Version 7.0.0StatusaffectedConstraints-
- Version 7.0.0.1StatusaffectedConstraints-
- Version 7.0.1StatusaffectedConstraints-
- Version 7.0.1.1StatusaffectedConstraints-
- Version 7.0.2StatusaffectedConstraints-
- Version 7.0.2.1StatusaffectedConstraints-
- Version 7.0.3StatusaffectedConstraints-
- Version 7.0.4StatusaffectedConstraints-
- Version 7.0.5StatusaffectedConstraints-
- Version 7.0.6StatusaffectedConstraints-
- Version 7.0.6.1StatusaffectedConstraints-
- Version 7.0.6.2StatusaffectedConstraints-
- Version 7.0.6.3StatusaffectedConstraints-
- Version 7.0.7StatusaffectedConstraints-
- Version 7.0.8StatusaffectedConstraints-
- Version 7.0.8.1StatusaffectedConstraints-
- Version 7.1.0StatusaffectedConstraints-
- Version 7.1.0.1StatusaffectedConstraints-
- Version 7.1.0.2StatusaffectedConstraints-
- Version 7.1.0.3StatusaffectedConstraints-
- Version 7.2.0StatusaffectedConstraints-
- Version 7.2.0.1StatusaffectedConstraints-
- Version 7.2.1StatusaffectedConstraints-
- Version 7.2.10StatusaffectedConstraints-
- Version 7.2.10.1StatusaffectedConstraints-
- Version 7.2.10.2StatusaffectedConstraints-
- Version 7.2.2StatusaffectedConstraints-
- Version 7.2.3StatusaffectedConstraints-
- Version 7.2.3.1StatusaffectedConstraints-
- Version 7.2.4StatusaffectedConstraints-
- Version 7.2.4.1StatusaffectedConstraints-
- Version 7.2.5StatusaffectedConstraints-
- Version 7.2.5.1StatusaffectedConstraints-
- Version 7.2.5.2StatusaffectedConstraints-
- Version 7.2.6StatusaffectedConstraints-
- Version 7.2.7StatusaffectedConstraints-
- Version 7.2.8StatusaffectedConstraints-
- Version 7.2.8.1StatusaffectedConstraints-
- Version 7.2.9StatusaffectedConstraints-
- Version 7.3.0StatusaffectedConstraints-
- Version 7.3.1StatusaffectedConstraints-
- Version 7.3.1.1StatusaffectedConstraints-
- Version 7.3.1.2StatusaffectedConstraints-
- Version 7.4.0StatusaffectedConstraints-
- Version 7.4.1StatusaffectedConstraints-
- Version 7.4.1.1StatusaffectedConstraints-
- Version 7.4.2StatusaffectedConstraints-
- Version 7.4.2.1StatusaffectedConstraints-
- Version 7.4.2.2StatusaffectedConstraints-
- Version 7.4.2.3StatusaffectedConstraints-
- Version 7.4.2.4StatusaffectedConstraints-
- Version 7.4.3StatusaffectedConstraints-
- Version 7.4.4StatusaffectedConstraints-
- Version 7.4.5StatusaffectedConstraints-
- Version 7.6.0StatusaffectedConstraints-
- Version 7.6.1StatusaffectedConstraints-
- Version 7.6.2StatusaffectedConstraints-
- Version 7.6.2.1StatusaffectedConstraints-
- Version 7.6.4StatusaffectedConstraints-
- Version 7.7.0StatusaffectedConstraints-
- Version 7.7.10StatusaffectedConstraints-
- Version 7.7.10.1StatusaffectedConstraints-
- Version 7.7.11StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Cisco | Cisco Secure Firewall Management Center (FMC) | n/a |
|
- 6.4.0.13
- 6.4.0.14
- 6.4.0.15
- 6.4.0.16
- 6.4.0.17
- 6.4.0.18
- 7.0.0
- 7.0.0.1
- 7.0.1
- 7.0.1.1
- 7.0.2
- 7.0.2.1
- 7.0.3
- 7.0.4
- 7.0.5
- 7.0.6
- 7.0.6.1
- 7.0.6.2
- 7.0.6.3
- 7.0.7
- 7.0.8
- 7.0.8.1
- 7.1.0
- 7.1.0.1
- 7.1.0.2
- 7.1.0.3
- 7.2.0
- 7.2.0.1
- 7.2.1
- 7.2.2
- 7.2.3
- 7.2.3.1
- 7.2.4
- 7.2.4.1
- 7.2.5
- 7.2.5.1
- 7.2.5.2
- 7.2.6
- 7.2.7
- 7.2.8
- 7.2.8.1
- 7.2.9
- 7.2.10
- 7.2.10.1
- 7.2.10.2
- 7.3.0
- 7.3.1
- 7.3.1.1
- 7.3.1.2
- 7.4.0
- 7.4.1
- 7.4.1.1
- 7.4.2
- 7.4.2.1
- 7.4.2.2
- 7.4.2.3
- 7.4.2.4
- 7.4.3
- 7.4.4
- 7.4.5
- 7.6.0
- 7.6.1
- 7.6.2
- 7.6.2.1
- 7.6.3
- 7.6.4
- 7.7.0
- 7.7.10
- 7.7.10.1
- 7.7.11
- 10.0.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
Date Added
Mar 19, 2026
Patch Due
Mar 22, 2026
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 SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
ActiveAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Mar 19, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Mar–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (7 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 42.66% (0.42665) | 98.67th | v5 (v2026.06.15) |
| Sep 11, 2026 | 33.38% (0.33379) | 98.27th | v5 (v2026.06.15) |
| Aug 10, 2026 | 31.23% (0.31231) | 98.10th | v5 (v2026.06.15) |
| Jun 15, 2026 | 27.55% (0.27551) | 97.82th | v5 (v2026.06.15) |
| Mar 21, 2026 | 0.88% (0.00881) | 75.18th | v4 (v2025.03.14) |
| Mar 20, 2026 | 5.60% (0.05604) | 90.22th | v4 (v2025.03.14) |
| Mar 5, 2026 | 0.44% (0.00437) | 62.68th | v4 (v2025.03.14) |
References (3)
- https://aws.amazon.com/blogs/security/amazon-threat-intelligence-teams-identify-interlock-ransomware-campaign-targeting-enterprise-firewalls/ third-party-advisoryTechnical Description
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-rce-NKhnULJh Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20131 government-resourceUS Government Resource
| Link | Providers | Tags |
|---|---|---|
| https://aws.amazon.com/blogs/security/amazon-threat-intelligence-teams-identify-interlock-ransomware-campaign-targeting-enterprise-firewalls/ | third-party-advisoryTechnical Description | |
| https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-rce-NKhnULJh | Vendor Advisory | |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20131 | government-resourceUS Government Resource |
Change history (0)
No recorded changes yet.