CVE-2023-28806: medium-severity vulnerability in Zscaler Client Connector
Signature validation error in DLL allows disabling anti-tampering protection
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.7epss 0.2%
An Improper Validation of signature in Zscaler Client Connector on Windows allows an authenticated user to disable anti-tampering. This issue affects Client Connector on Windows <4.2.0.190.
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
Affected products
Zscaler · Client ConnectorRelated CVEs — Zscaler Client Connector
In the same product, most dangerous first.
CVE-2024-23483HIGHLocal Privilege Escalation via lack of input validationEPSS 0.7%CVE-2026-59568CRITICALRemote Code ExecutionEPSS 0.7%CVE-2023-28800HIGHOutput encoding missing in redrurl parameterEPSS 0.5%CVE-2026-59564CRITICALAuthentication bypass between ZCC and client connector portalEPSS 0.5%CVE-2026-59565HIGHLocal and kernel denial-of-serviceEPSS 0.5%CVE-2024-23459HIGHMultiple Arbitrary Creates/Overwrites by link followingEPSS 0.5%