Vulnerability details
CVE-2026-20340
Cisco Secure Firewall Management Center
Cisco Secure Firewall Management Center Software Deserialization Arbitrary Root Command Execution Vulnerability
CVSS 3.1
8.8High
Official description
A vulnerability in Cisco Secure FMC Software could allow an authenticated, remote attacker to execute arbitrary commands at the root privilege level. This vulnerability is due to unsecured deserialization of web-management user-controlled data. An attacker could exploit this vulnerability by authenticating to the device and sending a crafted HTTP payload. A successful exploit could allow the attacker to save the crafted payload and then execute it on the underlying operating system as root. To exploit this vulnerability, the attacker must have valid credentials for a user account with at least the role of Security Analyst (read-only).
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.8High | 3.1 | CVEProject cvelistV5 (CNA) (cisco) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Cisco | Cisco Secure Firewall Management Center (FMC) | 10.0.0 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 10.0.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.0 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.0.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.1.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.2.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.5 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.6 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.6.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.6.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.6.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.7 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.8 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.8.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.9 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.0 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.0.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.10 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.10.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.10.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.11 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.3.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.4.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.5 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.5.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.5.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.6 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.7 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.8 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.8.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.2.9 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.3.0 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.3.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.3.1.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.3.1.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.4.0 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.4.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.4.1.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.4.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.4.2.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.4.2.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.4.2.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.4.2.4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.4.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.4.4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.4.5 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.4.6 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.4.7 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.6.0 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.6.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.6.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.6.2.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.6.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.6.4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.6.5 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.7.0 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.7.10 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.7.10.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.7.11 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.7.12 | CVEProject cvelistV5 (CNA) |
References and advisories
1
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Details
- Published
- 2026-09-16
- Last updated
- 2026-09-18
- State
- Published
- Assigner (CNA)
- cisco
Exploit prediction (EPSS)
0.74%
Probability of exploitation in 30 days
54.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-502Deserialization of Untrusted Data