CVE-2026-20353

Name of the Vulnerable Software and Affected Versions Cisco Secure Email Gateway (affected versions not specified) Cisco Secure Email and Web Manager (affected versions not specified)

Description Cisco Secure Email Gateway and Cisco Secure Email and Web Manager contain multiple issues related to improper control of a resource through its lifetime. This flaw can enable a Denial of Service (DoS) condition. Approximately 1,800 instances have been identified globally. These issues are categorized under the Common Weakness Enumeration (CWE) Pillar CWE-664, which refers to the failure to properly manage the lifecycle of a resource.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.