CVE-2026-20102

Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software SAML Reflected Cross-Site Scripting Vulnerability

MEDIUM

6.1

CVSS Score

Published: March 4, 2026 at 05:52 PM UTC

Updated: August 11, 2026 at 07:58 PM UTC

2 products affected across 1 vendorAdaptive Security ApplianceSecure Firewall Threat Defense

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Severity

MEDIUM6.1

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

A vulnerability in the SAML 2.0 single sign-on (SSO) feature of Cisco Secure Firewall ASA Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against the SAML feature and access sensitive, browser-based information. This vulnerability is due to insufficient input validation of multiple HTTP parameters. An attacker could exploit this vulnerability by persuading a user to access a malicious link. A successful exploit could allow the attacker to conduct a reflected XSS attack through an affected device.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Adaptive Security Appliance · Cisco

95%

9.16.1 ≤ v < 9.16.4.899.17.1 ≤ v < 9.18.4.719.20.1 ≤ v < 9.20.4.199.22.1.1 ≤ v < 9.22.2.329.23.1 ≤ v < 9.23.1.269.16.1 9.16.1.28 9.16.2 9.16.2.11 9.16.2.13 9.16.2.14 9.16.2.3 9.16.2.7 9.17.1 9.17.1.10 9.17.1.11 9.17.1.13 9.17.1.15 9.17.1.20 9.17.1.30 9.17.1.33 9.17.1.39 9.17.1.45 9.17.1.46 9.17.1.7 9.17.1.9 9.18.4.66 9.18.4.67 9.20.4.10 9.20.4.7 9.22.2.13 9.23.1.13 9.23.1.19

Affected range stops below 9.16.4.89, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.18.4.71, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.20.4.19, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.22.2.32, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.23.1.26, so it looks safe — our inference, not a vendor statement

Secure Firewall Threat Defense · Cisco

95%

7.0.0 ≤ v < 7.0.97.1.0 ≤ v < 7.2.117.4.0 ≤ v < 7.4.37.6.0 ≤ v < 10.0.07.0.0 7.0.0.1 7.0.1 7.0.1.1 7.1.0 7.1.0.1 7.1.0.2 7.1.0.3

Affected range stops below 10.0.0, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.2.11, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.4.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-saml-LktTrwZP

References (1)

Vendor Advisory

Source: cverecord

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-saml-LktTrwZP

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUMcisco

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: CHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-79

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