Cisco Warns of Unpatched Secure Email Flaws, Patches Critical Switch Vulnerabilities
Publicly disclosed S/MIME flaws could expose encrypted email content, while critical IOS XR and Nexus bugs could enable remote code execution and authentication bypass. The post Cisco Warns of Unpatched Secure Email Flaws, Patches Critical Switch Vulnerabilities appeared first on SecurityWeek.
Cisco on Wednesday warned that two unpatched vulnerabilities in its enterprise email security product Secure Email have been publicly disclosed.
The two flaws, tracked as CVE-2026-20354 and CVE-2026-20355, are medium-severity issues affecting the Secure/Multipurpose Internet Mail Extensions (S/MIME) decryption functionality of the threat protection solution.
According to Cisco, insufficient validation of message integrity can allow an attacker to intercept and modify traffic between email gateways using a man-in-the-middle (MitM) technique.
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