CVE-2026-20250
Description
A vulnerability in Datagram TLS (DTLS) message handling of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software for Cisco Secure Firewall 3100 Series and 4200 Series devices could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper resource management when processing certain DTLS messages. An attacker could exploit this vulnerability by sending a crafted stream of DTLS traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.23.1, 9.22.1.1, 9.22.1.3, 9.22.1.6, 9.22.2, 9.23.1.3, 9.22.2.4, 9.23.1.7, 9.22.2.9, 9.23.1.13, 9.22.2.13, 9.23.1.19, 9.22.2.14, 9.24.1, 9.23.1.22, 9.22.2.20, 9.23.1.26 | — |
| Cisco Cisco Secure Firewall Threat Defense (FTD) Software | 7.6.0, 7.7.0, 7.6.1, 7.6.2, 7.7.10, 7.7.11, 7.6.2.1, 7.7.10.1, 7.6.4, 10.0.0 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.