Is CVE-2026-20070 being actively exploited?

CVE-2026-20070 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2026-20070?

CVE-2026-20070 has a CVSS 3.1 base score of 6.1 (MEDIUM).

CVE-2026-20070

MEDIUM · CVSS 6.1EPSS 0.3%EU EUVD

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.

Key facts

CVSS score: 6.1 (v3.1)
Severity: MEDIUM
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-80
EPSS score: 0.3% (18th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2026-9469)
Published: March 4, 2026
NVD last modified: August 11, 2026
Status: Analyzed

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2026-9469 in the EU Vulnerability Database. Last updated in EUVD on March 4, 2026.

View on the EU Vulnerability Database

Affected products

cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
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cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
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cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
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cisco / adaptive security appliance software
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cisco / adaptive security appliance software
cisco / adaptive security appliance software
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cisco / adaptive security appliance software
cisco / adaptive security appliance software
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cisco / adaptive security appliance software
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cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
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cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software
cisco / adaptive security appliance software

and 186 more…

Certified products that may be affected

2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Cisco Secure Firewall Threat Defense (FTD) 7.4 with Secure Firewall Management Center (FMC) 7.4 and Secure Client 5.1 - Cisco Systems, Inc. - Common Criteria NSCIB-CC-2400046-01-CR - active
Cisco Secure Firewall Threat Defense Virtual 7.4 with FMC/FMCv - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-11510-2025 - active

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-webvpn-xss-uwjc4HR(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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