CVE-2026-76442: Cisco Secure Email

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Email Gateway and Cisco Secure Email and Web Manager engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-76442 are related to issues with improper validation of specified quantity in input that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-1284.

Affected products

• Cisco Cisco Secure Email: version 14.0.0-698 only; version 13.5.1-277 only; version 13.0.0-392 only; version 14.2.0-620 only; version 13.0.5-007 only; version 13.5.4-038 only; …
• Cisco Cisco Secure Email And Web Manager: version 13.6.2-023 only; version 13.6.2-078 only; version 13.0.0-249 only; version 13.0.0-277 only; version 13.8.1-052 only; version 13.8.1-068 only; …

Published 2026-09-14. Last modified 2026-09-16.