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.
Analysis
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| Cisco | Cisco Secure Firewall Management Center (FMC) | unknown |
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No vendor fix or workaround currently provided.
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Tracking
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Wed, 16 Sep 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Cisco Secure Firewall Management Center Software sftunnel Deserialization Root Command Execution Vulnerability | |
| Weaknesses | CWE-502 | |
| References |
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| Metrics |
cvssV3_1
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: cisco
Published:
Updated: 2026-09-16T20:08:28.260Z
Reserved: 2025-10-08T11:59:15.413Z
Link: CVE-2026-20341
Vulnrichment
No data.
NVD
Status : Awaiting Analysis
Published: 2026-09-16T20:17:24.193
Modified: 2026-09-16T20:35:23.620
Link: CVE-2026-20341
Redhat
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OpenCVE Enrichment
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CWE-502
Deserialization of Untrusted Data