Is CVE-2026-20101 actively exploited?

No active exploitation of CVE-2026-20101 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-20101 be exploited remotely?

Yes. CVE-2026-20101 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-20101?

CVE-2026-20101 has a CVSS score of 8.6 (HIGH).

HOME VULNERABILITIESCVE-2026-20101

HIGH

CVE-2026-20101

CWE-330Published: March 4, 2026· Updated: Mar 5, 2026

8.6

CVSS v3.1

EPSS:0.10%probability of exploitation in 30 daysPercentile:28.5th

Official Description

A vulnerability in the SAML 2.0 single sign-on (SSO) feature of Cisco Secure Firewall ASA Software and Secure FTD Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a DoS condition.

This vulnerability is due to insufficient error checking when processing SAML messages. An attacker could exploit this vulnerability by sending crafted SAML messages to the SAML service. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

NVD Source

Technical Analysis

CVE-2026-20101 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 8.6.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.