CVE-2026-20070 | Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software VPN Web Services Cross-Site Scripting Vulnerability

A vulnerability in the VPN web services component of Cisco Secure Firewall Adaptive Security Appliance (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 a browser that is accessing an affected device.  This vulnerability is due to improper validation of user-supplied input in HTTP requests. An attacker could exploit this vulnerability by persuading a user to follow a link to a malicious website that is designed to submit malicious input to the affected application. A successful exploit could allow the attacker to execute arbitrary HTML or script code in the browser in the context of the VPN web server.

Published: 2026-03-04 Last update: 2026-05-04 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-20070 is rated Low Risk (26.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.02%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-20070

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-05 — 0.02% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-20070

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.1 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 2.7 [email protected]

Weakness enumeration for CVE-2026-20070

Affected software / configurations for CVE-2026-20070

Vendor Product Version Raw CPE
cisco adaptive_security_appliance_software 9.12.1 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.1:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.1.2 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.1.2:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.1.3 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.1.3:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.2 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.2:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.2.1 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.2.1:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.2.4 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.2.4:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.2.5 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.2.5:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.2.9 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.2.9:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.3 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.3:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.3.2 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.3.2:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.3.7 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.3.7:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.3.9 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.3.9:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.3.12 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.3.12:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.2 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.2:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.4 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.4:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.7 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.7:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.8 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.8:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.10 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.10:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.13 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.13:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.18 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.18:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.24 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.24:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.26 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.26:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.29 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.29:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.30 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.30:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.35 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.35:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.37 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.37:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.38 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.38:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.39 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.39:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.40 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.40:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.41 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.41:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.47 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.47:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.48 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.48:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.50 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.50:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.52 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.52:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.54 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.54:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.55 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.55:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.56 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.56:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.58 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.58:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.62 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.62:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.65 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.65:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.12.4.67 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.12.4.67:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.1 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.1:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.1.28 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.1.28:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.2 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.2:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.2.3 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.2.3:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.2.7 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.2.7:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.2.11 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.2.11:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.2.13 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.2.13:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.2.14 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.2.14:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.3 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.3:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.3.3 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.3.3:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.3.14 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.3.14:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.3.15 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.3.15:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.3.19 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.3.19:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.3.23 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.3.23:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.9 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.9:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.14 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.14:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.19 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.19:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.27 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.27:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.38 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.38:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.39 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.39:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.42 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.42:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.48 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.48:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.55 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.55:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.57 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.57:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.61 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.61:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.62 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.62:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.67 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.67:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.70 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.70:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.71 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.71:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.76 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.76:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.82 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.82:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.84 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.84:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.16.4.85 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.16.4.85:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.17.1 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.17.1:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.17.1.7 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.17.1.7:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.17.1.9 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.17.1.9:*:*:*:*:*:*:*
cisco adaptive_security_appliance_software 9.17.1.10 cpe:2.3:o:cisco:adaptive_security_appliance_software:9.17.1.10:*:*:*:*:*:*:*

References for CVE-2026-20070

cvelogic Threat Intelligence