CVE-2026-76519
Cisco Secure Email Gateway Arbitrary File Write Vulnerability
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.
Weakness: CWE-23
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Secure Email Gateway | Email Security | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco Secure Email
Vendor advisory
Cisco Secure Email Gateway Arbitrary File Write Vulnerability
Cisco’s rating: Critical (advisory CVSS 9.8) · Published Oct 14, 2026
Bug ID: CSCwu56223
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from