CVE-2026-19377CWE-295

CVE-2026-19377

published October 15, 2026

CVSS
6.0
EPSS
0%
Percentile
0.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
6.0 · NONE
CVSS v4.0
6.0 · CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00083 · 0.2th percentile
Weakness
CWE-295 · Improper Certificate Validation
Published
2026-10-15T11:17Z
References (1)
https://knowledge.catonetworks.com/docs/security-vulnerability-cve-2026-19377-that-impacts-cato-client-versions · 2505284f-8ffb-486c-bf60-e19c1097a90b
EPSS history
Timeline
  • 16 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 15 OCT 07:02Z
    Improper certificate validation in Cato Client tunnel handshake
    cvelistv5
  • 15 OCT 07:02Z
    Improper certificate validation in Cato Client tunnel handshake
    cvelistv5