CASCACascade Atlas

Evidence dossier

CVE-2020-3580

Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Interface Cross-Site Scripting Vulnerabilities

65.0–88.7Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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.

State
PUBLISHED
Published
Oct 21, 2020
Updated
Oct 21, 2025
Evidence coverage
72%
CISA KEVCatalog member

Apply updates per vendor instructions.

FIRST EPSS85.44%

2026-07-18 · v2026.06.15 · percentile 99.7%

Source stateConflict visible

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

ciscooriginal assertion
container

Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Interface Cross-Site Scripting Vulnerabilities

CVEderivative copy
container

CVE Program Container

CISA KEVoriginal assertion
observed_exploitation

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

FIRST EPSSoriginal assertion
model_probability

Probability 0.854390000000; percentile 0.996960000000

Applicability

Cited product scope

Trace impact →
CiscoCisco Adaptive Security Appliance (ASA) Software
[{"status": "affected", "version": "n/a"}]unknown
Unknown vendorUnknown product
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*; end excluding 9.8.4.34supported
Unknown vendorUnknown product
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*; start including 9.9; end excluding 9.9.2.85supported
Unknown vendorUnknown product
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*; start including 9.10; end excluding 9.12.4.13supported
Unknown vendorUnknown product
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*; start including 9.13; end excluding 9.13.1.21supported
Unknown vendorUnknown product
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*; start including 9.14; end excluding 9.14.2.8supported
Unknown vendorUnknown product
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*; start including 9.15; end excluding 9.15.1.15supported
Unknown vendorUnknown product
cpe:2.3:o:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*; end excluding 6.4.0.12supported
Unknown vendorUnknown product
cpe:2.3:o:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*; start including 6.5.0; end excluding 6.6.4supported
Unknown vendorUnknown product
cpe:2.3:o:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*; start including 6.7.0; end excluding 6.7.0.2supported

Assessments

CVSS by origin

6.1
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
2.6
nvd@nist.govCVSS 2.0 · role PrimaryAV:N/AC:H/Au:N/C:N/I:P/A:N
6.1
psirt@cisco.comCVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1
ciscoCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.