CVE-2026-50571 Log Hunting Ansible playbook

[Duane_Toler]

This is a complete Ansible playbook with Jinja template to query your management server(s) to hunt for attackers and exploit attempts for CVE-2025-50571.  Log results are saved to a CSV file to send to your InfoSec group or other relevant teams.

This is based on the contents of Check Point's Auth Bypass Detection Guide (https://sc1.checkpoint.com/documents/PDF/AuthBypassDetectionGuide.pdf) and the suggested log query from sk185033 (https://support.checkpoint.com/results/sk/sk185033).

How To Get It

• You can clone the repo to get the playbook, the template, and the sample inventory:

git clone https://github.com/Webfargo/ansible-playbooks-check_point.git

Edit the sample inventory file (inventory/inventory.yml) and set the IP address of your management server.  If you have an MDS server, then set the leading IP of your MDS server, uncomment the ansible_checkpoint_domain line, and enter the name of your management domain.

Recommended: Be sure you have an administrator with API key authentication.  The README shows how to encrypt the API key string to save in the inventory file.

• Alternatively, if you already have an inventory, you can download just the playbook the template directly:

https://github.com/Webfargo/ansible-playbooks-check_point/tree/main/CVE-2026-50751

https://github.com/Webfargo/ansible-playbooks-check_point/tree/main/CVE-2026-50751/templates

In this case, since you already have an inventory, you already know how to use it. 🙂 Read the README for some optional parameters.

How To Run It

ansible-playbook -i inventory/ CVE-2026-50751.yml --ask-vault-pass

Enter the ansible-vault password you used and you're done!  You will have a new CSV file in a directory named CVE-2025-50571/<name of your mgmt server>/.

Sample CSV Output

Here is what the CSV will look like.  The last column, "Exploited", will show positive exploit attempts (where "Quick Mode" was established) .

"Date Time","Gateway","Action","Source","Destination","IKE Message","Exploited"
'2026-05-27 08:44:49',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-27 08:44:49',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-27 08:44:49',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-27 08:44:49',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-27 08:44:49',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-27 08:44:49',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-27 08:44:49',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:53:50',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:53:50',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:53:50',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:53:50',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:53:50',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:53:50',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:53:29',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:53:29',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:53:28',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:53:28',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:53:28',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:51:20',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:51:20',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: invalid cookie',No
'2026-05-22 06:51:20',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: invalid cookie',No
'2026-05-22 06:51:20',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: invalid cookie',No
'2026-05-22 06:50:42',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:50:42',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:50:42',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:50:42',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: invalid payload type',No
'2026-05-22 06:50:41',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No
'2026-05-22 06:50:41',cpgw01,'Key Install',192.0.2.2,38.60.157.139,'Main Mode Sent Notification to Peer: payload malformed',No

To query for exploit-only logs, run the playbook with the parameter "-e exploit_only=true".

Optional debug is available with the "-e debug=true" parameter.