Live › vulnerability › CVE-2025-20333
Go to dashboardCisco ASA and Secure Firewall Threat Defense VPN web server has a buffer overflow that allows remote code execution. The sources say it is being exploited in the wild and can be chained with CVE-2025-20362.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
The KEV due date refers to the deadline by which FCEB agencies are expected to review and begin implementing the guidance outlined in Emergency Directive (ED) 25-03 (URL listed below in Notes). Agencies must follow the mitigation steps provided by CISA (URL listed below in Notes) and vendor’s instructions (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense | vendor | – | – |
| cisco adaptive security appliance software | vendor | >= 9.12, < 9.12.4.72 | 9.12.4.72 |
| cisco adaptive security appliance software | vendor | >= 9.14, < 9.14.4.28 | 9.14.4.28 |
| cisco adaptive security appliance software |
| vendor |
| >= 9.16, < 9.16.4.85 |
| 9.16.4.85 |
| cisco adaptive security appliance software | vendor | >= 9.17.0, < 9.17.1.45 | 9.17.1.45 |
| cisco adaptive security appliance software | vendor | >= 9.18, < 9.18.4.47 | 9.18.4.47 |
| cisco adaptive security appliance software | vendor | >= 9.19, < 9.19.1.37 | 9.19.1.37 |
| cisco adaptive security appliance software | vendor | >= 9.20, < 9.20.3.7 | 9.20.3.7 |
| cisco adaptive security appliance software | vendor | >= 9.22, < 9.22.1.3 | 9.22.1.3 |
| cisco secure firewall threat defense | vendor | >= 7.0.0, < 7.0.8.1 | 7.0.8.1 |
| cisco secure firewall threat defense | vendor | >= 7.1.0, < 7.2.9 | 7.2.9 |
| cisco secure firewall threat defense | vendor | >= 7.3.0, < 7.4.2.4 | 7.4.2.4 |
| cisco secure firewall threat defense | vendor | = 7.6.0 | – |
Unknown from the sources.
Upgrade to 9.12.4.72 / 9.14.4.28 / 9.16.4.85 / 9.17.1.45 / 9.18.4.47 / 9.19.1.37 / 9.20.3.7 / 9.22.1.3 / 7.0.8.1 / 7.2.9 / 7.4.2.4
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Software VPN Web Server contain a buffer overflow vulnerability that allows for remote code execution. This vulnerability could be chained with CVE-2025-20362.
CISA required action: The KEV due date refers to the deadline by which FCEB agencies are expected to review and begin implementing the guidance outlined in Emergency Directive (ED) 25-03 (URL listed below in Notes). Agencies must follow the mitigation steps provided by CISA (URL listed below in Notes) and vendor’s instructions (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.
This page as .md · .json · in your agent: get_signal("CVE-2025-20333")
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