SB2025092570 - Remote authenticated code execution in Cisco ASA and FTD
Published: September 25, 2025
Security Bulletin ID
SB2025092570
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Buffer overflow (CVE-ID: CVE-2025-20333)
The vulnerability allows a remote user to compromise the affected system.
The vulnerability exists due to a boundary error within the VPN Web Server when handling HTTP requests. A remote authenticated VPN user can send specially crafted HTTP requests to the affected device, trigger a buffer overflow and execute arbitrary code with root privileges.
Remediation
Install update from vendor's website.