Tracker / CVE-2026-20021
CVE-2026-20021
Medium 4.3
A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, adjacent attacker to exhaust memory on an affected device, resulting in a denial of service (DoS) condition. This vulnerability is due to improperly validating input by the OSPF protocol when parsing packets. An attacker could exploit this vulnerability by by sending crafted OSPF packets to an affected device. A successful exploit could allow the attacker to exhaust memory on the affected device, resulting in a DoS condition.
Affected products and versions
| cisco | adaptive_security_appliance_software · 9.12.1 → 9.12.4.67 |
|---|---|
| cisco | adaptive_security_appliance_software · 9.16.1 → 9.16.4.85 |
| cisco | adaptive_security_appliance_software · 9.17.1 → 9.17.1.46 |
| cisco | adaptive_security_appliance_software · 9.18.1 → 9.18.4.68 |
| cisco | adaptive_security_appliance_software · 9.19.1 → 9.19.1.42 |
| cisco | adaptive_security_appliance_software · 9.20.1 → 9.20.4.14 |
| cisco | adaptive_security_appliance_software · 9.22.1.1 → 9.22.2.14 |
| cisco | adaptive_security_appliance_software · 9.23.1 → 9.23.1.22 |
| cisco | secure_firewall_threat_defense |
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.