CVE-2026-20018
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 file on the underlying operating system.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 5.9
- CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
- EPSS probability
- 0.42%
- CWE
- CWE-27
- Published
- 2026-03-04
- Last modified
- 2026-03-12
Affected products
- Cisco Cisco Secure Firewall Management Center (FMC)
- Cisco Cisco Secure Firewall Management Center (FMC)
- Cisco Cisco Secure Firewall Management Center (FMC)
- Cisco Cisco Secure Firewall Management Center (FMC)
- Cisco Cisco Secure Firewall Management Center (FMC)
- Cisco Cisco Secure Firewall Management Center (FMC)
- Cisco Cisco Secure Firewall Management Center (FMC)
- Cisco Cisco Secure Firewall Management Center (FMC)
Weakness type
Related vulnerabilities
- CVE-2026-76344 — Path Traversal through the Search Dispatch REST API in Splunk Enterprise
- CVE-2026-62391 — Apache Kyuubi: kyuubi.session.local.dir.allow.list bypass via unprefixed Spark file-conf aliases
- CVE-2026-24457 — An unsafe parsing of OpenMQ's configuration, allows a remote attacker to read arbitrary files from...
- CVE-2025-66518 — Apache Kyuubi: Unauthorized directory access due to missing path normalization
- CVE-2025-58292 — Denial of service (DoS) vulnerability in the office service. Successful exploitation of this...
- CVE-2025-10438 — Path Traversal in Yordam BT's Yordam Katalog
- CVE-2025-58761 — Tautulli vulnerable to Unauthenticated Path Traversal in `real_pms_image_proxy`
- CVE-2024-43658 — Using the <redacted> action or <redacted>.sh script, arbitrary files and directories can be deleted using directory traversal.