CVE-2026-20022

medium Cisco
CVSS v3 Base Score
6.1
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS Score
0.0%
Exploitation probability in 30 days
Top 100% most likely to be exploited
Attack Characteristics
Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Published: March 4, 2026 (70 days ago)
Last Modified: May 4, 2026
Vendor: Cisco
Source: NVD

Description

A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition when OSPF canonicalization debug is enabled by using the command debug ip ospf canon. This vulnerability is due to insufficient input validation when processing OSPF LSU packets. An attacker could exploit this vulnerability by sending crafted unauthenticated OSPF packets. A successful exploit could allow the attacker to write to memory outside of the packet data, causing the device to reload, resulting in a DoS condition.

CWE

CWE-823

Affected Products

cisco adaptive security appliance softwarecisco firepower threat defense software

References

🔗 sec.cloudapps.cisco.com