CVE-2026-25687CWE-366

CVE-2026-25687

High · published September 14, 2026

CVSS v3.1
8.1
EPSS
0%
Percentile
30.8
In the wild
Unconfirmed
What it is

A race condition in the ZPA tunnel handler of affected versions of Zscaler Client Connector (ZCC) allows a heap corruption, resulting in a denial of service (client crash) and potentially arbitrary code execution in the context of the ZCC process.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00380 · 30.8th percentile
Weakness
CWE-366 · Race Condition within a Thread
Published
2026-09-14T19:17Z
References (1)
https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026 · [email protected]
EPSS history
Timeline
  • 16 SEP 04:26Z
    EPSS moved — → 0%
    epss
  • 14 SEP 14:37Z
    ZCC race condition in ZPA tunnel handler
    cvelistv5