Vulnerability Intelligence

CVE-2020-3452

High 7.5 Exploited in the wild (KEV)

Published
Last modified
NVD status
Analyzed

CISA KEV catalog

Confirmed active exploitation.

Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.

CISA KEV
Name
Cisco ASA and FTD Read-Only Path Traversal Vulnerability
Added to catalog
Remediation due date (US federal)
Required action
Apply updates per vendor instructions.

Description

A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct directory traversal attacks and read sensitive files on a targeted system. The vulnerability is due to a lack of proper input validation of URLs in HTTP requests processed by an affected device. An attacker could exploit this vulnerability by sending a crafted HTTP request containing directory traversal character sequences to an affected device. A successful exploit could allow the attacker to view arbitrary files within the web services file system on the targeted device. The web services file system is enabled when the affected device is configured with either WebVPN or AnyConnect features. This vulnerability cannot be used to obtain access to ASA or FTD system files or underlying operating system (OS) files.

Affected products

cisco: adaptive security appliance software; cisco: asa 5505; cisco: asa 5510; cisco: asa 5512-x; cisco: asa 5515-x; cisco: asa 5520; cisco: asa 5525-x; cisco: asa 5540; cisco: asa 5545-x; cisco: asa 5550; cisco: asa 5555-x; cisco: asa 5580; cisco: asa 5585-x; cisco: secure firewall threat defense

References10

Metrics

CVSS 3.1
7.5 HIGH Score source: NVD CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS — exploit probability
100% percentile: 100 · as of 2 November 2026
CWE
CWE-20CWE-22