【Vulnerability Alert】Cisco Secure Email Gateway has a critical security vulnerability (CVE-2026-76519)

• Subject:Cisco Secure Email Gateway has a critical security vulnerability (CVE-2026-76519)

• Description:
  • Forwarded from the TWCERT/CC Security Alert TWCERTCC-200-202610-00000023
  • Cisco has published a critical security vulnerability (CVE-2026-76519, CVSS: 9.8) for Cisco Secure Email Gateway. This vulnerability exists in Advanced Malware Protection (AMP) and may allow an unauthenticated remote attacker to write arbitrary files on the underlying operating system.
• Affected Platforms:
  • Cisco AsyncOS Software for Cisco Secure Email Gateway version 15.5, Cisco AsyncOS Software for Cisco Secure Email Gateway version 160, Cisco AsyncOS Software for Cisco Secure Email Gateway version 16.5
• Recommended Actions:
  • Please update to the following versions: Cisco AsyncOS Software for Cisco Secure Email Gateway version 15.5.5-014, Cisco AsyncOS Software for Cisco Secure Email Gateway version 16.5.0-780
• References:
  1. https://www.twcert.org.tw/tw/cp-169-11288-17ac8-1.html

Computer and Communication Center
Network System Division