CVE-2026-20355 | Cisco Secure Email up to 16.5.0-780 S/MIME Decryption missing encryption

September 2, 2026 Yanac

A vulnerability classified as problematic has been found in Cisco Secure Email. Affected is an unknown function of the component S/MIME Decryption. The manipulation leads to missing encryption of sensitive data.

This vulnerability is listed as CVE-2026-20355. The attack may be initiated remotely. There is no available exploit.

It is recommended to upgrade the affected component.VulDB Recent EntriesRead More