HIGH CISA KEV

CVE-2026-20349

CVSS v3

8.6

HIGH

EPSS Score

1.0 %

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

Description

A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.  This vulnerability is due to insufficient error checking when processing HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to t

CISA Known Exploited Vulnerability

Date Added: 2026-08-11
Patch Due Date: 2026-08-14
Ransomware Use: Unknown

Technical details

CVSS v3 Vector: 3.1
Published: 2026-08-11
Last Modified: 2026-08-12

Frequently asked questions

What is CVE-2026-20349?

Is CVE-2026-20349 actively exploited?

Yes. CVE-2026-20349 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-08-14.

What is the CVSS score for CVE-2026-20349?

CVE-2026-20349 has a CVSS v3 base score of 8.6 (HIGH severity), with vector string 3.1.

Is CVE-2026-20349 affecting your environment?

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