Riskcovery

CVE-2026-19377

Improper certificate validation in Cato Client tunnel handshake

State
Published
Severity
6.0 Medium
Published
Oct 15, 2026
Updated
Oct 15, 2026
Reserved
Aug 9, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.06.0 MediumCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:NCato

Weaknesses

  • CWE-295 Improper Certificate Validation

Affected Products

ProductVersions
Cato Client for WindowsCato Networks
  • before 6.12.6Affected
Cato Client for macOSCato Networks
  • before 6.1.1Affected
Cato Client for LinuxCato Networks
  • before 5.8.1Affected
Cato Client for iOSCato Networks
  • before 5.9Affected
Cato Client for AndroidCato Networks
  • before 5.6.2Affected

References

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