CVE-2026-20023 | Cisco Secure Firewall Adaptive Security Appliance Software OSPF Protocol out-of-bounds write (cisco-sa-asaftd-ospf-ZH8PhbSW)
A vulnerability was found in Cisco Secure Firewall Adaptive Security Appliance Software and Secure Firewall Threat Defense Software. It has been rated as critical. The impacted element is an unknown function of the component OSPF Protocol Handler. This manipulation causes out-of-bounds write.
This vulnerability is tracked as CVE-2026-20023. The attack is only possible within the local network. No exploit exists.
Upgrading the affected component is advised.