CVE-2020-3580

Act now ● On CISA KEV — actively exploited used in ransomware

Actively exploited — on the CISA KEV list.

CVSS base

6.1 MEDIUM

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

EPSS — probability of exploitation (30 days)

85.6%

99.7th percentile

CISA KEV

Listed

Added 2021-11-03 · patch by 2022-05-03

Weakness / dates

CWE-79

Published 2020-10-21 · modified 2026-08-11

CVSS breakdown

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

Attack Vector	N	Network
Attack Complexity	L	Low
Privileges Required	N	None
User Interaction	R	Required
Scope	C	Changed
Confidentiality	L	Low
Integrity	L	Low
Availability	N	None

Timeline

2020-10-21 — Published (NVD)
2021-11-03 — Added to CISA KEV (actively exploited)
2022-05-03 — CISA patch-by deadline
2026-08-11 — Last modified (NVD)

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.

Affected

cisco

References

Official: NVD · CVE.org