CVE-2026-19377
Received
Received - Intake
Improper Certificate Validation in Cato Client Tunnel Handshake
Vulnerability report for CVE-2026-19377, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-15
Last updated on: 2026-10-15
Assigner: Cato
Description
Description
Improper certificate validation in the tunnel handshake in Cato Client allows a man-in-the-middle attacker to impersonate a Cato Point of Presence (PoP) server and intercept or modify tunnel traffic.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Cato | Networks | Cato Client for Windows 0 |
| Cato | Networks | Cato Client for macOS 0 |
| Cato | Networks | Cato Client for Linux 0 |
| Cato | Networks | Cato Client for iOS 0 |
| Cato | Networks | Cato Client for Android 0 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-295 | The product does not validate, or incorrectly validates, a certificate. |
