CVE-2026-20022
What it is
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.
At a glance
- Exploitability
- Can be exploited from the same network segment without logging in. High risk of service disruption.
- Exploit odds
- 0.2% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.2% in the next 30 days (EPSS).
- Severity: 6.1 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.2% · EPSS, next 30 days
- Weakness
- CWE-823
- Record status
- Analyzed
Affected
- Cisco Adaptive Security Appliance Software 9.12.1
- Cisco Adaptive Security Appliance Software 9.12.1.2
- Cisco Adaptive Security Appliance Software 9.12.1.3
- Cisco Adaptive Security Appliance Software 9.12.2
- Cisco Adaptive Security Appliance Software 9.12.2.1
- Cisco Adaptive Security Appliance Software 9.12.2.4
- Cisco Adaptive Security Appliance Software 9.12.2.5
- Cisco Adaptive Security Appliance Software 9.12.2.9
Attack profile CVSS 3.1 · 6.1
- Attack vector
- Adjacent network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-20022.md and follow it. Check whether this project is affected by CVE-2026-20022. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
