CVE-2026-76519 Cisco Secure Email Gateway Arbitrary File Write Vulnerability
9.8 KEV Actively exploited according to CISA
Analysis on rafaelpfister.ch
Vendor description
A vulnerability in the Advanced Malware Protection (AMP) feature of Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to write arbitrary files on the underlying operating system.
This vulnerability is due to improper handling of email attachments when the file reputation service is enabled. An attacker could exploit this vulnerability by sending an email that contains a crafted attachment through an affected device. A successful exploit could allow the attacker to write arbitrary files and execute commands with root privileges on the underlying operating system. Reference data
- Vendor
- Cisco
- Affected products
- Cisco Secure Email
- CVSS 3.1
- 9.8 (CRITICAL)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness type
- CWE-23
- Published
- October 14, 2026
- In KEV catalog since
- October 14, 2026
- US federal deadline
- October 17, 2026
