Cisco Expressway RCE

Cisco Expressway

Unauthenticated remote attacker can execute arbitrary operating system commands as root.

Do this now

Apply Cisco's fix for Expressway as soon as possible, and block unauthenticated access to its interfaces until then.

First seen: 21 Oct 2026
Last update: 21 Oct 2026, 16:00 UTC
Identifiers: CVE-2026-76466
CVSS: 9.8
Source: news
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 Expressway RCE
Severity: critical. Patch status: patched.
Affected: Cisco Expressway
Ids: CVE-2026-76466

Unauthenticated remote attacker can execute arbitrary operating system commands as root.

## 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-2026-76466") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vcs-static-cred-hr7EWZ8t?vs_f=Cisco%20Security%20Advisory%26vs_cat=Security%20Intelligence%26vs_type=RSS%26vs_p=Cisco%20Expressway%20Series%20Remote%20Code%20Execution%20Vulnerability%26vs_k=1
https://pwned.coffee/i/cisco-expressway-rce

Receipt

Exploitation: No known exploitation
Fix: Cisco has released software updates that address this vulnerability.
Score: CVSS 9.8 (critical). CVSS 3.1 9.8 (CNA cisco) for CVE-2026-76466
Last checked: 24 Oct 2026, 17:17 UTC

Sources: KEV – CVE record ✓ Vendor ✓

Sources

sec.cloudapps.cisco.com: Cisco Expressway Series Remote Code Execution Vulnerability

Totalone very hot coffee