CVE-2026-20023 DetailDescriptionA 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. Metrics
NVD enrichment efforts reference publicly available information to associate
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CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
CNA: Cisco Systems, Inc.
Base
Score: 6.1 MEDIUM
Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
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Weakness Enumeration
Known Affected Software Configurations Switch to CPE 2.2CPEs loading, please wait.
Denotes Vulnerable Software Change History79 change records found show changesCPE Deprecation Remap by NIST 8/11/2026 3:40:47 PM
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CVE Modified by CISA-ADP 6/17/2026 6:16:55 AM
CVE Modified by Cisco Systems, Inc. 6/17/2026 6:16:55 AM
Initial Analysis by NIST 5/04/2026 11:13:16 AM
New CVE Received from Cisco Systems, Inc. 3/04/2026 2:16:14 PM
Quick InfoCVE Dictionary Entry:CVE-2026-20023 NVD Published Date: 03/04/2026 NVD Last Modified: 08/11/2026 Source: Cisco Systems, Inc. |
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