VDB
CVE-2026-20022
CVE-2026-20022
PUBLISHED
CVSS 6.099999904632568 MEDIUM
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.
EPSS 0.01% · 0.4th 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
0.01%
0.4th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.12.1, 9.12.1.2, 9.12.1.3 |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 6.4.0.4, 6.4.0, 6.4.0.1 |
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 13, 2026 EPSS Score