CVE-2020-3580Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Interface Cross-Site Scripting Vulnerabilities
Updated under an hour ago ()
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It affects Cisco Adaptive Security Appliance (ASA) Software and 2 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Nov 3, 2021; federal agencies had to remediate by May 3, 2022, and it is known to be used in ransomware. Treat that date as your deadline.
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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.
- CVSS
- 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Added to CISA KEV Nov 3, 2021; federal remediation due May 3, 2022; known ransomware useApply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 85.58% (percentile 100)
- Assigned by
- cisco
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Cisco Cisco Adaptive Security Appliance (ASA) Software cisco:adaptive_security_appliance_asa_software (from the name) | all versions | CNA record |
cisco secure_firewall_threat_defense cisco:secure_firewall_threat_defense | before 6.4.0.12; from 6.5.0 before 6.6.4; from 6.7.0 before 6.7.0.2 | NVD |
cisco adaptive_security_appliance_software cisco:adaptive_security_appliance_software | before 9.8.4.34; from 9.9 before 9.9.2.85; from 9.10 before 9.12.4.13; from 9.13 before 9.13.1.21; from 9.14 before 9.14.2.8; from 9.15 before 9.15.1.15 | NVD |
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-xss-multiple-FCB3vPZevendor-advisory, x-refsource-cisco, patch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3580us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.