Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2020-3452
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Read-Only Path Traversal Vulnerability
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N U H N N 7.5 .9999 100.0 YES
AFFECTED
Product Versions Fixed
Cisco Adaptive Security Appliance (ASA) Software unspecified – —
TIMELINE
Dec 12 Reserved by cisco
Jul 22 Published (CNA: cisco)
Nov 3 Added to CISA KEV, remediation due 2022-05-03
Aug 11 ENRICHED — CVE-2020-3452 (Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)). Received CVSS 7.5 and CPE data from NVD.
Aug 11 EXPLOIT PUBLISHED — CVE-2020-3452 (Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)). Public exploit reference added.
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.
Lifecycle
Complete event history — 5 events, chronological
| Date | Event | Detail |
|---|
| December 12, 2019 | Reserved | Reserved by cisco |
| July 22, 2020 | Published | Published (CNA: cisco) |
| November 3, 2021 | KEV ADDED | Added to CISA KEV, remediation due 2022-05-03 |
| August 11, 2026 | ENRICHED | ENRICHED — CVE-2020-3452 (Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)). Received CVSS 7.5 and CPE data from NVD. |
| August 11, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2020-3452 (Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)). Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Cisco | Cisco Adaptive Security Appliance (ASA) Software | — | unspecified | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2020-3452 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
