Medium [CVE-2026-20018] Cisco Secure Firewall Management Center and Secure Firewall Threat Defense Software Path Traversal Vulnerability
This medium-severity Cisco advisory covers CVE-2026-20018 affecting Cisco Secure Firewall Management Center (FMC) 7.0.0.1, Cisco Secure Firewall Management Center (FMC) 7.0.1.1, Cisco Secure Firewall Management Center (FMC) 7.0.2.1.
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Summary
A vulnerability in the sftunnel functionality of Cisco Secure Firewall Management Center (FMC) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker with administrative privileges to write arbitrary files as root on the underlying operating system.
This vulnerability is due to insufficient validation of the directory path during file synchronization. An attacker could exploit this vulnerability by crafting a directory path outside of the expected file location.
A successful exploit could allow the attacker to create or replace any fil…
Affected products named by the advisory: Cisco Secure Firewall Management Center (FMC) 7.0.0.1; Cisco Secure Firewall Management Center (FMC) 7.0.1.1; Cisco Secure Firewall Management Center (FMC) 7.0.2.1; Cisco Secure Firewall Management Center (FMC) 7.0.3; and 2 more.
- Scope: At the time of publication, this vulnerability affected Cisco devices if they were running a vulnerable release of Cisco Secure FMC Software or Secure FTD Software, regardless of device configuration.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- There are no workarounds that address this vulnerability.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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