VDB
CVE-2026-20023
CVE-2026-20023
PUBLISHED
CVSS 6.099999904632568 MEDIUM
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.
EPSS 0.03% · 7.6th percentile
Risk Scores
CVSS 3.1
6.099999904632568
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS Score
0.03%
7.6th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 6.4.0.1, 6.4.0.3, 6.4.0.5 |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.12.3, 9.12.3.2, 9.12.3.7 |
Timeline
- Oct 8, 2025 CVE ID Reserved
- Mar 4, 2026 CVE Published
- Mar 4, 2026 PoC Published
- Mar 4, 2026 CVE Updated
- Mar 5, 2026 EPSS Score
- Mar 6, 2026 EPSS Score
- Mar 7, 2026 EPSS Score
- Mar 9, 2026 EPSS Score
- Mar 10, 2026 EPSS Score
- Mar 11, 2026 EPSS Score
- Mar 12, 2026 EPSS Score
- Mar 14, 2026 EPSS Score