What is CVE-2023-28798?

CVE-2023-28798 is a medium-severity vulnerability in Zscaler Client Connector, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2024-05-02.

How severe is CVE-2023-28798?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Zscaler Client Connector

CVE-2023-28798

An out-of-bounds write to heap in the pacparser library on Zscaler Client Connector on Mac may lead to arbitrary code execution.

Vulnerability class: Buffer Overflow

Published 2024-05-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.004 (35.4th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Zscaler Client Connector — versions 0
Zscaler Client Connector

Weakness classification (CWE)

References

help.zscaler.com/client-connector/client-connector-app-release-summary-2022 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2023-28798?: CVE-2023-28798 is a medium-severity vulnerability in Zscaler Client Connector, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2024-05-02.
How severe is CVE-2023-28798?: Medium severity. CVSS v3 base score is 6.5 out of 10.