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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 0.02% · 5.9th percentile

Risk Scores

CVSS v3.1
6.099999904632568
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS Score
0.02%
5.9th percentile

Affected Products

VendorProductVersions
CiscoCisco Secure Firewall Threat Defense (FTD) Software6.4.0, 6.4.0.1, 6.4.0.3
CiscoCisco Secure Firewall Adaptive Security Appliance (ASA) Software9.20.3.13, 9.20.3.16, 9.20.4

Timeline

References

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