Local and kernel denial-of-service

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-59565
StatePUBLISHED
AssignerZscaler
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-24 14:16:55 UTC
Updated2026-08-28 18:39:48 UTC
DescriptionA remotely exploitable buffer overflow bug can cause a local and kernel denial-of-service attack on affected versions of Zscaler Client Connector on Windows.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.002700000 probability, percentile 0.188840000 (date 2026-08-30)

Problem Types: CWE-229 | CWE-229 CWE-229 Improper handling of values

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Zscaler Client Connector affected Windows: 4.6.0.457, 4.7.0.317, 4.8.0.232, 4.9.0.372 custom Windows

References

ReferenceSourceLinkTags
help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary... [email protected] help.zscaler.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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