Cisco Secure Email Gateway Relative Path Traversal Vulnerability

Cisco Secure Email Gateway

Cisco Secure Email Gateway contains a relative path traversal vulnerability that could allow an unauthenticated, remote attacker to write arbitrary files on the underlying operating system. Added to CISA KEV on 2026-10-14 (federal deadline 2026-10-17).

First seen: 14 Oct 2026
Last update: 14 Oct 2026, 12:00 UTC
Identifiers: CVE-2026-76519
CVSS: 9.8
Source: CISA KEV
On the menu as: VPN & firewalls

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Cisco Secure Email Gateway Relative Path Traversal Vulnerability
Severity: critical, exploited in the wild. Patch status: patched.
Affected: Cisco Secure Email Gateway
Ids: CVE-2026-76519

Cisco Secure Email Gateway contains a relative path traversal vulnerability that could allow an unauthenticated, remote attacker to write arbitrary files on the underlying operating system. Added to CISA KEV on 2026-10-14 (federal deadline 2026-10-17).

## Steps
1. This touches infrastructure (vpn-edge). Look in terraform, ansible, cloud-init, Dockerfiles and docs for the product and version we run. If it isn't in the repo, say so and list what a human should check on the box.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-76519") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://nvd.nist.gov/vuln/detail/CVE-2026-76519 https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-afw-zqYJkjxp
https://pwned.coffee/i/cisco-secure-email-gateway-relative-path-traversal-vulne-cve-2026-76519

Sources

Totalone very hot coffee