---
title: "CVE-2020-3580: Cisco Adaptive Security Appliance Software… | CubePath"
description: "Multiple vulnerabilities in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD)…"
language: en
source: https://cubepath.com/security/cve/CVE-2020-3580
---

# CVE-2020-3580: Cisco Adaptive Security Appliance Software… | CubePath

## Description

Multiple vulnerabilities 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 cross-site scripting (XSS) attacks against a user of the web services interface of an affected device. The vulnerabilities are due to insufficient validation of user-supplied input by the web services interface of an affected device. An attacker could exploit these vulnerabilities by persuading a user of the interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the interface or allow the attacker to access sensitive, browser-based information. Note: These vulnerabilities affect only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.

Official description from the CVE record, published by cisco. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-3580)

## Key data

### CVSS 3.1 Medium 6.1

Score published by cisco in the CVE record.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

| Metric                 | Value    | What it means                                                                       |
| ---------------------- | -------- | ----------------------------------------------------------------------------------- |
| Attack vector          | Network  | The vulnerable component can be reached over a network, possibly from the Internet. |
| Attack complexity      | Low      | No special conditions are needed. The attack can be repeated at will.               |
| Privileges required    | None     | No account or privileges are needed.                                                |
| User interaction       | Required | A user has to do something first, such as opening a file or following a link.       |
| Scope                  | Changed  | The impact can reach other components beyond the vulnerable one.                    |
| Confidentiality impact | Low      | Limited effect on the secrecy of data.                                              |
| Integrity impact       | Low      | Limited effect on the trustworthiness of data.                                      |
| Availability impact    | None     | No effect on availability.                                                          |

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) .

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.85575 (85.6% probability)

Percentile

99.7%

Scores of

Nov 10, 2026

Model

v2026.06.15

### CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog

Cisco ASA and FTD Cross-Site Scripting (XSS) Vulnerability

Added to the catalog

Nov 3, 2021

Federal due date

May 3, 2022

Ransomware campaigns

Known use

### CISA assessment as of Nov 8, 2024

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation

Recorded by CISA as active

Automatable

no

Technical impact

partial

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-79](https://cwe.mitre.org/data/definitions/79.html) Improper Neutralization of Input During Web Page Generation

## Affected products

Products listed in the CVE record, as the CNA published them.

- Cisco Adaptive Security Appliance (ASA) Software

  - affected: n/a

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [20201021 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Interface Cross-Site Scripting Vulnerabilities](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-xss-multiple-FCB3vPZe)  (tools.cisco.com) vendor-advisory

## Timeline

1. ID reserved Dec 12, 2019
2. Record published Oct 21, 2020
3. Added to CISA KEV Nov 3, 2021
4. Record last updated Oct 21, 2025

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:36 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)