VDB
CVE-2026-20336
CVE-2026-20336
PUBLISHED
CVSS 8.8 HIGH
Reported by cisco · Published September 16, 2026
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-2026-20336 are related to issues concerning improper control of a resource through its lifetime that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-664.
Risk Scores
CVSS 3.1
8.8
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.1, 9.16.1.28, 9.16.2 |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.0, 7.0.0.1, 7.0.1 |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.0.1, 7.0.1, 7.0.1.1 |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.1, 9.16.1.28, 9.16.2 |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.0.1, 7.0.1, 7.0.1.1 |
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.0.0, 7.0.0.1, 7.0.1 |
Timeline
- Sep 16, 2026 Coalition ESS Score
- Sep 16, 2026 CVE Published
- Sep 17, 2026 EPSS Score
- Sep 18, 2026 CVE Updated