SB2026030445 - Authenticated path traversal in Cisco Firewall Threat Defense (FTD)
Published: March 4, 2026
Security Bulletin ID
SB2026030445
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Path traversal (CVE-ID: CVE-2026-20018)
CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in the sftunnel functionality. A remote privileged user can send a specially crafted HTTP request and read arbitrary files on the system as root.
Remediation
Install update from vendor's website.