Tracker / CVE-2026-20039
CVE-2026-20039
High 8.6
A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to ineffective memory management of the VPN web server. An attacker could exploit this vulnerability by sending a large number of crafted HTTP requests to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
Affected products and versions
| cisco | adaptive_security_appliance_software · 9.12.1 → 9.16.4.84 |
|---|---|
| cisco | adaptive_security_appliance_software · 9.17.1 → 9.18.4.57 |
| cisco | adaptive_security_appliance_software · 9.19.1 → 9.20.3.16 |
| cisco | adaptive_security_appliance_software · 9.22.1.1 → 9.22.2.4 |
| cisco | adaptive_security_appliance_software · 9.23.1 → 9.23.1.3 |
| cisco | secure_firewall_threat_defense · 6.4.0 → 7.0.9 |
| cisco | secure_firewall_threat_defense · 7.1.0 → 7.2.10 |
| cisco | secure_firewall_threat_defense · 7.3.0 → 7.4.3 |
| cisco | secure_firewall_threat_defense · 7.6.0 → 7.6.1 |
| cisco | secure_firewall_threat_defense · 7.7.0 → 7.7.10 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.