CVE-2020-3452

Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Read-Only Path Traversal Vulnerability

HIGH

7.5

CVSS Score

Published: July 22, 2020 at 08:00 PM UTC

Updated: August 11, 2026 at 07:48 PM UTC

14 products affected across 1 vendorAdaptive Security ApplianceSecure Firewall Threat DefenseASA 5580

Using Cisco Adaptive Security Appliance (ASA) Software by Cisco?

Get instant alerts when new vulnerabilities affect Cisco Adaptive Security Appliance (ASA) Software - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

HIGH7.5

Exploitation

CISA KEV

Exploit prediction

EPSS 100%

SSVC

Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score100.0%

EPSS (Exploit Prediction Scoring System) estimates a 100.0% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an improper input validation vulnerability when HTTP requests process URLs. 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.

Required Action

Apply updates per vendor instructions.

Ransomware Use

Unknown

Added to KEV

Nov 3, 2021

Remediation Due

May 3, 2022

1638 days overdue

Notes

https://nvd.nist.gov/vuln/detail/CVE-2020-3452

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Adaptive Security Appliance · Cisco

95%

v < 9.10.1.42v < 9.13.1.10v < 9.14.1.10v < 9.6.4.42v < 9.8.4.20v < 9.9.2.749.10 ≤ v < 9.10.1.429.12 ≤ v < 9.12.3.129.13 ≤ v < 9.13.1.109.14 ≤ v < 9.14.1.109.6 ≤ v < 9.6.4.429.8 ≤ v < 9.8.4.209.9 ≤ v < 9.9.2.74

Affected range stops below 9.10.1.42, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.12.3.12, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.13.1.10, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.14.1.10, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.6.4.42, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.8.4.20, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.9.2.74, so it looks safe — our inference, not a vendor statement

cisco-asa-5505 (environment) · cisco-asa-5510 (environment) · cisco-asa-5512-x (environment) · cisco-asa-5515-x (environment) · cisco-asa-5520 (environment) · cisco-asa-5525-x (environment) · cisco-asa-5540 (environment) · cisco-asa-5545-x (environment) · cisco-asa-5550 (environment) · cisco-asa-5555-x (environment) · cisco-asa-5580 (environment) · cisco-asa-5585-x (environment)

Secure Firewall Threat Defense · Cisco

95%

6.2.3 ≤ v < 6.2.3.166.3.0 ≤ v < 6.3.0.66.4.0 ≤ v < 6.4.0.106.5.0 ≤ v < 6.5.0.56.6.0 ≤ v < 6.6.0.1

ASA 5505 · Ciscodevice

80%

All versions

ASA 5510 · Ciscodevice

80%

All versions

Asa 5512-X · Ciscodevice

80%

All versions