Vulnerability · Published Mar 4, 2026 · Assigned by cisco
CVE-2026-20024
Medium 6.8
In plain English
A medium-severity memory corruption in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).
Official description
A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an authenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition. To exploit this vulnerability, the attacker must have the OSPF secret key. This vulnerability is due to heap corruption in OSPF when parsing packets. An attacker could exploit this vulnerability by sending crafted packets to the OSPF service. A successful exploit could allow the attacker to corrupt the heap, causing the affected device to reload, resulting in a DoS condition.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.12.19.12.1.29.12.1.39.12.29.12.2.49.12.2.59.12.2.99.12.3 |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 6.4.06.4.0.16.4.0.36.4.0.26.4.0.46.4.0.56.4.0.66.4.0.7 |
Weakness: CWE-119 · Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H