CiscoCVE-2026-20336
As part of Cisco's ongoing commitment to proactive security and product quality
High8.8CVE-2026-20336 · Published Sep 16, 2026 · updated Sep 18, 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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software Product | <= 9.16.1 | No fix yet |
| <= 9.16.1.28 | No fix yet | |
| <= 9.16.2 | No fix yet | |
| <= 9.16.2.3 | No fix yet | |
| Cisco Secure Firewall Management Center (FMC) Product | <= 7.0.0 | No fix yet |
| <= 7.0.0.1 | No fix yet | |
| <= 7.0.1 | No fix yet | |
| <= 7.0.1.1 | No fix yet | |
| Cisco Secure Firewall Threat Defense (FTD) Software Product | <= 7.0.0.1 | No fix yet |
| <= 7.0.1 | No fix yet | |
| <= 7.0.1.1 | No fix yet | |
| <= 7.0.2 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-664
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