CVE-2026-59566: CWE-229 Improper handling of values in Zscaler Client Connector
Description
CVE-2026-59566 is a high-severity vulnerability in Zscaler Client Connector for Android and ChromeOS. It involves improper handling of values (CWE-229) leading to a locally exploitable buffer overflow. This flaw can cause a local denial-of-service (DoS) condition on affected devices. No specific affected versions or patches are currently documented. There is no indication of active exploitation in the wild.
CVSS v3.1
Score 8.4high
Affected software
Zscaler
Client Connector
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2026-59566, is a buffer overflow issue caused by improper handling of values in the Zscaler Client Connector product on Android and ChromeOS platforms. The flaw allows a local attacker to trigger a denial-of-service condition by exploiting the buffer overflow. The CVSS 3.1 base score is 8.4, reflecting high impact on confidentiality, integrity, and availability. No remediation level or patch information is currently available, and no known exploits have been reported.
Potential Impact
Successful exploitation results in a local denial-of-service attack, potentially disrupting the availability of the Zscaler Client Connector on affected devices. The CVSS score indicates high impact on confidentiality, integrity, and availability, but the attack requires local access and no privileges, with no user interaction needed.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict local access to trusted users and monitor for unusual application behavior. Follow vendor updates closely for official patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Zscaler
- Date Reserved
- 2026-07-06T06:18:59.633Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8c504bacd9273b49a22810
Added to database: 08/24/2026, 14:08:11 UTC
Last enriched: 09/10/2026, 10:52:06 UTC
Last updated: 10/06/2026, 18:48:23 UTC
Views: 57
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