CVE-2026-20101

HIGH

8.6

CVSS Score

Published: March 4, 2026 at 05:19 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

HIGH8.6

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

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.

Affected

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

Adaptive Security Appliance · Cisco

95%

9.12.1 ≤ v < 9.16.4.859.17.1 ≤ v < 9.18.4.669.19.1 ≤ v < 9.20.49.22.1.1 ≤ v < 9.22.2.49.23.1 ≤ v < 9.23.1.79.12.1 9.12.1.2 9.12.1.3 9.12.2 9.12.2.1 9.12.2.4 9.12.2.5 9.12.2.9 9.12.3 9.12.3.12 9.12.3.2 9.12.3.7 9.12.3.9 9.12.4 9.12.4.10 9.12.4.13 9.12.4.18 9.12.4.2 9.12.4.24 9.12.4.26 9.12.4.29 9.12.4.30 9.12.4.35 9.12.4.37 9.12.4.38 9.12.4.39 9.12.4.4 9.12.4.40 9.12.4.41 9.12.4.47 9.12.4.48 9.12.4.50 9.12.4.52 9.12.4.54 9.12.4.55 9.12.4.56 9.12.4.58 9.12.4.62 9.12.4.65 9.12.4.67 9.12.4.7 9.12.4.8 9.16.1 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 9.16.3 9.16.3.14 9.16.3.15 9.16.3.19 9.16.3.23 9.16.3.3 9.16.4 9.16.4.14 9.16.4.19 9.16.4.27 9.16.4.38 9.16.4.39 9.16.4.42 9.16.4.48 9.16.4.55 9.16.4.57 9.16.4.61 9.16.4.62 9.16.4.67 9.16.4.70 9.16.4.71 9.16.4.76 9.16.4.82 9.16.4.84 9.16.4.9 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 9.18.1 9.18.1.3 9.18.2 9.18.2.5 9.18.2.7 9.18.2.8 9.18.3 9.18.3.39 9.18.3.46 9.18.3.53 9.18.3.55 9.18.3.56 9.18.4 9.18.4.22 9.18.4.24 9.18.4.29 9.18.4.34 9.18.4.40 9.18.4.47 9.18.4.5 9.18.4.50 9.18.4.52 9.18.4.53 9.18.4.57 9.18.4.8 9.19.1 9.19.1.12 9.19.1.18 9.19.1.22 9.19.1.24 9.19.1.27 9.19.1.28 9.19.1.31 9.19.1.37 9.19.1.38 9.19.1.42 9.19.1.5 9.19.1.9 9.20.1 9.20.1.5 9.20.2 9.20.2.10 9.20.2.21 9.20.2.22 9.20.3 9.20.3.10 9.20.3.13 9.20.3.16 9.20.3.20 9.20.3.4 9.20.3.7 9.20.3.9 9.22.1.1 9.22.1.2 9.22.1.3 9.22.1.6 9.22.2 9.23.1 9.23.1.3

Affected range stops below 9.16.4.85, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.18.4.66, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.20.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.22.2.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.23.1.7, so it looks safe — our inference, not a vendor statement

Secure Firewall Threat Defense · Cisco

95%

6.4.0 ≤ v < 7.0.97.1.0 ≤ v < 7.2.117.3.0 ≤ v < 7.4.37.6.0 ≤ v < 7.6.47.7.0 ≤ v < 7.7.116.4.0 6.4.0.1 6.4.0.10 6.4.0.11 6.4.0.12 6.4.0.13 6.4.0.14 6.4.0.15 6.4.0.16 6.4.0.17 6.4.0.18 6.4.0.2 6.4.0.3 6.4.0.4 6.4.0.5 6.4.0.6 6.4.0.7 6.4.0.8 6.4.0.9 7.0.0 7.0.0.1 7.0.1 7.0.1.1 7.0.2 7.0.2.1 7.0.3 7.0.4 7.0.5 7.0.6 7.0.6.1 7.0.6.2 7.0.6.3 7.0.7 7.0.8 7.0.8.1 7.1.0 7.1.0.1 7.1.0.2 7.1.0.3 7.2.0 7.2.0.1 7.2.1 7.2.10 7.2.10.2 7.2.2 7.2.3 7.2.4 7.2.4.1 7.2.5 7.2.5.1 7.2.5.2 7.2.6 7.2.7 7.2.8 7.2.8.1 7.2.9 7.3.0 7.3.1 7.3.1.1 7.3.1.2 7.4.0 7.4.1 7.4.1.1 7.4.2 7.4.2.1 7.4.2.2 7.4.2.3 7.4.2.4 7.6.0 7.6.1 7.6.2 7.6.2.1 7.7.0 7.7.10 7.7.10.1

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

Affected range stops below 7.6.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.7.11, 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-vpn-m9sx6MbC

References (1)

Vendor Advisory

Source: cverecord

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-m9sx6MbC

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

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

CVSS

8.6HIGHcisco

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

Vector?

Quick Info

StatusANALYZED

CWE

CWE-330

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