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Cybersecurity watch

Cisco Secure Email Secure/Multipurpose Internet Mail Extensions Ciphertext Decryption Vulnerabilities

Cisco Security Advisories

Why it matters

This page references a cybersecurity signal published by Cisco Security Advisories. It helps CISOs, DPOs, IT leaders, infrastructure teams, SMBs and enterprise accounts track vulnerabilities, alerts and trends that may affect security, compliance or system resilience.

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This signal should be mapped against the application inventory, internet exposure and patch-management process. The key point is not only the existence of a vulnerability, but how quickly the organization can verify whether it is affected.

Watch points

  • Presence of the product or component in the environment
  • External exposure or administrator access
  • Patch, workaround and maintenance window

Recommended action

Check exposure against the inventory, qualify whether the component is present, then decide quickly between patching, workaround or reinforced monitoring.

Relevant for

CISOs, IT leaders, infrastructure teams, operations and application owners.

Source summary

Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions (S/MIME) decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages. These vulnerabilities are due to insufficient validation of message integrity. An attacker could exploit these...

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