CVE-2026-20023 MEDIUM

CVE-2026-20023

Vendor Cisco
Product Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
Weakness CWE-787
Published March 4, 2026
Last update March 4, 2026

CVSS base score

6.1/10
Attack vector Adjacent
Attack complexity High
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 4, 2026 CVE published
March 4, 2026 Record updated