Cisco Secure Email Gateway Relative Path Traversal Vulnerability
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Secure Email Gateway, fix it now.
CISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
US federal civilian agencies must remediate by Oct 17, 2026.
No official fix confirmed yet
Until a fix ships, follow the vendor's mitigations and CISA's required action, limit exposure of affected systems, and watch this record for a patch.
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.
Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.
| Product | Vendor | Source |
|---|---|---|
| Secure Email Gateway | Cisco | KEV |
Sources: KEV = CISA Known Exploited Vulnerabilities catalog. Version details have not been published yet.
Developments from the last 30 days, newest first.
CVE-2026-76519 scored CVSS 9.8: Cisco Secure Email Gateway, Cisco Secure Email Gateway Relative Path Traversal Vulnerability
CISA lists this as exploited in the wild. Unpatched Secure Email Gateway systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
CVE-2026-76519 added to CISA KEV: Cisco Secure Email Gateway, Cisco Secure Email Gateway Relative Path Traversal Vulnerability
CISA lists this as exploited in the wild. Unpatched Secure Email Gateway systems are exposed to active attacks now.
Basis: CISA Known Exploited Vulnerabilities catalog
CISA lists this as exploited in the wild. Unpatched AhsayCBS and PAN-OS / GlobalProtect systems are exposed to active attacks now.
Treat this as an emergency.
CISA lists this as exploited in the wild. Unpatched Cisco networking & security and Secure Email Gateway systems are exposed to active attacks now.
Treat this as an emergency.
