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CVE-2026-20335

Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software and Secure Firewall Management Center Software Hardening Release - Incorrect Calculation Vulnerabilities

HIGH
8.1
CVSS Score
Published: September 16, 2026 at 08:10 PM UTC
Updated: September 18, 2026 at 08:17 PM UTC
3 products affected across 1 vendorAdaptive Security ApplianceSecure Firewall Threat DefenseSecure Firewall Management Center

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Severity
HIGH8.1
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Adaptive Security Appliance Software, Cisco Secure Firewall Threat Defense Software and Cisco Secure Firewall Management Center Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20335 are related to incorrect calculation issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-682.

Affected

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

Adaptive Security Appliance· Cisco
60%
9.16.19.16.1.289.16.29.16.2.119.16.2.139.16.2.149.16.2.39.16.2.79.16.39.16.3.149.16.3.159.16.3.199.16.3.239.16.3.39.16.49.16.4.149.16.4.189.16.4.199.16.4.279.16.4.389.16.4.399.16.4.429.16.4.489.16.4.559.16.4.579.16.4.619.16.4.629.16.4.679.16.4.709.16.4.719.16.4.769.16.4.829.16.4.849.16.4.859.16.4.899.16.4.99.16.4.929.18.1.39.18.29.18.2.59.18.2.79.18.2.89.18.39.18.3.399.18.3.469.18.3.539.18.3.559.18.3.569.18.49.18.4.1359.18.4.229.18.4.249.18.4.299.18.4.349.18.4.409.18.4.479.18.4.59.18.4.509.18.4.529.18.4.539.18.4.579.18.4.669.18.4.679.18.4.689.18.4.719.18.4.769.18.4.89.18.4.829.19.1.429.20.19.20.1.59.20.29.20.2.109.20.2.219.20.2.229.20.39.20.3.109.20.3.139.20.3.169.20.3.209.20.3.49.20.3.79.20.3.99.20.49.20.4.109.20.4.149.20.4.199.20.4.229.20.4.2359.20.4.289.20.4.309.20.4.349.20.4.79.22.1.19.22.1.29.22.1.39.22.1.69.22.29.22.2.139.22.2.149.22.2.209.22.2.329.22.2.49.22.2.99.22.39.22.3.59.23.19.23.1.139.23.1.199.23.1.1959.23.1.229.23.1.269.23.1.39.23.1.329.23.1.79.24.19.24.1.119.24.1.1559.24.1.59.24.1.99.24.10
Secure Firewall Management Center· Cisco
60%
10.0.010.0.17.0.07.0.0.17.0.17.0.1.17.0.27.0.2.17.0.37.0.47.0.57.0.67.0.6.17.0.6.27.0.6.37.0.77.0.87.0.8.17.0.97.2.07.2.0.17.2.17.2.107.2.10.17.2.10.27.2.117.2.27.2.37.2.3.17.2.47.2.4.17.2.57.2.5.17.2.5.27.2.67.2.77.2.87.2.8.17.2.97.3.07.3.17.3.1.17.3.1.27.4.07.4.17.4.1.17.4.27.4.2.17.4.2.27.4.2.37.4.2.47.4.37.4.47.4.57.4.67.4.77.6.07.6.17.6.27.6.2.17.6.37.6.47.6.57.7.07.7.107.7.10.17.7.117.7.12
Secure Firewall Threat Defense· Cisco
60%
10.0.07.0.0.17.0.17.0.1.17.0.27.0.2.17.0.37.0.47.0.57.0.67.0.6.17.0.6.27.0.6.37.0.77.0.87.0.8.17.0.97.3.07.3.17.3.1.17.3.1.27.4.07.4.17.4.1.17.4.27.4.2.17.4.2.27.4.2.37.4.2.47.4.37.4.47.4.77.6.07.6.17.6.27.6.2.17.6.47.7.07.7.107.7.10.17.7.11

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-asaftdfmc-uvpPROhN

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

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

CVSS

8.1HIGHcisco
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-682

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