Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Read-Only Path Traversal Vulnerability
- Severity
- High7.5CVSS 3.1, High
- EPSS
- 100%
- Published
- 22 Jul 2020
- Updated
- 11 Aug 2026
Description
Title, description and vendor guidance are quoted from the source records.
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.
Weakness: CWE-20, CWE-22
Known exploited
Added to CISA KEV on 3 Nov 2021
Federal remediation due date: 3 May 2022
Required action: Apply updates per vendor instructions.
Exploit prediction
100% probability of exploitation in the next 30 days (percentile 100%).
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
Patcharo shows this vulnerability for information but does not match versions for this product yet.
- Cisco Cisco Adaptive Security Appliance (ASA) Software · unspecified < 9.6.4.42, unspecified < 9.8.4.20, unspecified < 9.9.2.74, unspecified < 9.10.1.42, unspecified < 9.13.1.10, unspecified < 9.14.1.10
References
Provenance
Every fact on this page comes from the sources below. Nothing is written by an AI.
- Cisco (CVE record)
- Cisco (CVE record) · 27 Sept 2026, 23:46 UTC · Parser patcharo-cve5/1.1.0
- CISA Known Exploited Vulnerabilities
- CISA Known Exploited Vulnerabilities · 27 Sept 2026, 23:42 UTC · Parser patcharo-kev/1.0.0
- NVD
- NVD · 27 Sept 2026, 23:44 UTC · Parser patcharo-nvd/1.0.0
- FIRST EPSS
- FIRST EPSS · 27 Sept 2026, 23:46 UTC · Parser patcharo-epss/1.0.0
Last verified: 28 Sept 2026, 02:31 UTC