Exploitation Summary
CVE-2025-20333 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added September 25, 2025. EIP tracks 1 public exploit from researchers including curtishoughton.
AI-analyzed exploit summary This repository contains a Python-based scanner that checks for the presence of vulnerable endpoints related to CVE-2025-20333, a heap buffer overflow vulnerability in Cisco ASA/FTD WebVPN file upload handler. The scanner performs safe GET requests to detect reachable endpoints but does not attempt exploitation.
Description
A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to improper validation of user-supplied input in HTTP(S) requests. An attacker with valid VPN user credentials could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as root, possibly resulting in the complete compromise of the affected device.
Exploits (1)
This repository contains a Python-based scanner that checks for the presence of vulnerable endpoints related to CVE-2025-20333, a heap buffer overflow vulnerability in Cisco ASA/FTD WebVPN file upload handler. The scanner performs safe GET requests to detect reachable endpoints but does not attempt exploitation.
References (3)
Scores
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H