Check Point Advisories

Cisco Multiple AsyncOS Products Integer Overflow (CVE-2025-20393)

Vulnerability
Protection

Check Point Reference:	CPAI-2025-13668
Date Published:	24 Mar 2026
Severity:	High
Last Updated:	Tuesday 24 March, 2026
Source:
Industry Reference:	CVE-2025-20393
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Cisco Systems Secure Email and Web Manager prior to 15.0.2-007 Cisco Systems Secure Email and Web Manager prior to 15.5.4-007 Cisco Systems Secure Email and Web Manager prior to 16.0.4-010 Cisco Systems Secure Email Gateway 14.2 and earlier Cisco Systems Secure Email Gateway prior to 15.0.5-016 Cisco Systems Secure Email Gateway prior to 15.5.4-012 Cisco Systems Secure Email Gateway prior to 16.0.4-016
Vulnerability Description	An integer overflow vulnerability in multiple Cisco AsyncOS products allows remote attackers to execute arbitrary commands with root privileges by sending crafted requests to the Spam Quarantine component.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Cisco Multiple AsyncOS Products Integer Overflow (CVE-2025-20393) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Cisco Protection Violation.
Attack Information: Cisco Multiple AsyncOS Products Integer Overflow (CVE-2025-20393)