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CVE-2026-20341

Cisco Secure Firewall Management Center Software sftunnel Deserialization Root Command Execution Vulnerability

CVSS 3.1 9.1 CRITICALCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-20341

Published

A vulnerability in the sftunnel inter-device communication protocol of Cisco Secure FMC Software could allow an authenticated, remote attacker to obtain root privileges. This vulnerability is due to unsecured deserialization of untrusted data over the sftunnel management connection. An attacker could exploit this vulnerability by sending crafted sftunnel remote procedure calls (RPCs). A successful exploit could allow the attacker to gain root privileges on a device that is running Cisco Secure FMC Software and its high-availability peer. To exploit this vulnerability, the attacker must have valid administrative credentials on a managed Cisco FTD device.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-20341

Published

Cisco Secure Firewall Management Center (FMC)

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Cisco",
                    "product": "Cisco Secure Firewall Management Center (FMC)",
                    "versions": [
                        {
                            "version": "7.0.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.0.0.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.0.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.0.1.1",
                            "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": "7.2.0.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.0.4",
                            "status": "affected"
                        },
                        {
                            "version": "7.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.0.5",
                            "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": "7.2.3.1",
                            "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": "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": "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": "7.6.3",
                            "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",
                            "status": "affected"
                        },
                        {
                            "version": "7.0.9",
                            "status": "affected"
                        },
                        {
                            "version": "7.2.11",
                            "status": "affected"
                        },
                        {
                            "version": "7.7.12",
                            "status": "affected"
                        },
                        {
                            "version": "7.6.5",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.6",
                            "status": "affected"
                        },
                        {
                            "version": "10.0.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.7",
                            "status": "affected"
                        }
                    ],
                    "defaultStatus": "unknown"
                }

Original source record · Cite this exact observation · Complete original publisher JSON