6.1
Medium
CVE-2026-20023 A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco…
Description
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 unauthenticated, adjacent attacker to corrupt memory on an affected device, resulting in a denial of service (DoS) condition. This vulnerability is due to memory corruption when parsing OSPF protocol packets. An attacker could exploit this vulnerability by sending crafted OSPF packets to an affected device. A successful exploit could allow the attacker to cause memory corruption causing the affected device to reboot, resulting in a DoS condition.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.23 | 9.23.1 → 9.23.1.22 | No fix stated |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22 | 9.22.1.1 → 9.22.2.14 | No fix stated |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | 9.20.1 → 9.20.4.14 | No fix stated |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19 | 9.19.1 → 9.19.1.42 | No fix stated |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | 9.18.1 → 9.18.4.68 | No fix stated |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17 | 9.17.1 → 9.17.1.46 | No fix stated |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | 9.16.1 → 9.16.4.85 | No fix stated |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | 9.12.1 → 9.12.4.67 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.7 | 7.7.0 → 7.7.10.1 | No fix stated |
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| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco Secure Firewall Threat Defense (FTD) Software 7.6 | 7.6.0 → 7.6.2.1 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.4 | 7.4.0 → 7.4.3 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.3 | 7.3.0 → 7.3.1.2 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | 7.2.0 → 7.2.10.2 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.1 | 7.1.0 → 7.1.0.3 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | 7.0.0 → 7.0.8.1 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | 6.4.0 → 6.4.0.18 | No fix stated |
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