CVE-2023-28795

Description

Origin Validation Error vulnerability in Zscaler Client Connector on Linux allows Inclusion of Code in Existing Process. This issue affects Zscaler Client Connector for Linux: before 1.3.1.6.

Overview

State: PUBLISHED
Assigner (CNA): Zscaler
CVSS severity: HIGH
CVSS score: 7.8 / 10
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Effective score: 7.8 / 10 HIGH source: CNA overview
CWE(s): CWE-346
Reserved: 2023-03-23
Published: 2023-10-23 15:27 UTC
Last updated: 2025-02-27 21:39 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2023/28xxx/CVE-2023-28795.json
Linked Threat: CVE-2023-28795 — Client IPC validation bypass

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2023-10-23 14:15:09 UTC
NVD last modified: 2026-06-17 05:48:47 UTC
NVD CVSS v3.1: 7.8 / 10 HIGH source: cve@zscaler.com
NVD CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore: 1.8 / 10
Impact subscore: 5.9 / 10
EPSS score: 0.0015 (probability of exploitation in next 30 days)
EPSS percentile: 4.45% vs all CVEs — higher = more likely to be exploited, as of 2026-07-30

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2023-32430
Assigner: Zscaler
Published: Oct 23, 2023, 1:27:24 PM
Updated: Feb 27, 2025, 8:39:47 PM
EUVD base score (CVSS 3.1): 7.8 / 10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EUVD-reported EPSS: 0.0300
Vendors: Zscaler
Products: Client Connector (0 <1.3.1.6)
Aliases: GHSA-wwff-qqfj-cv2g

ENISA description: Origin Validation Error vulnerability in Zscaler Client Connector on Linux allows Inclusion of Code in Existing Process. This issue affects Zscaler Client Connector for Linux: before 1.3.1.6.

EUVD references (1)

https://help.zscaler.com/client-connector/client-connector-app-release-summary-2022?applicable_category=Linux&applicable_version=1.3.1&deployment_date=2022-09-19

Affected products (1)

Vendor	Product	Versions	Platforms
Zscaler	Client Connector	`0` (affected)	—

Affected products — CPE 2.3 (1) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:linux:*:*

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

https://help.zscaler.com/client-connector/client-connector-app-release-summary-2022?applicable_category=Linux&applicable_version=1.3.1&deployment_date=2022-09-19

MITRE references (1) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

https://help.zscaler.com/client-connector/client-connector-app-release-summary-2022?applicable_category=Linux&applicable_version=1.3.1&deployment_date=2022-09-19

Web references (2)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

https://attackerkb.com/topics/CVE-2023-28795 rapid7:attackerkb.com
https://www.cve.org/CVERecord?id=CVE-2023-28795 rapid7:www.cve.org

NVD-tagged references (2)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://help.zscaler.com/client-connector/client-connector-app-release-summary-2022?applicable_category=Linux&applicable_version=1.3.1&deployment_date=2022-09-19 cve@zscaler.com Release Notes
https://help.zscaler.com/client-connector/client-connector-app-release-summary-2022?applicable_category=Linux&applicable_version=1.3.1&deployment_date=2022-09-19 af854a3a-2127-422b-91ae-364da2661108 Release Notes

Indicators (1)

IOCs linked to the auto-promoted Threat row.

Type	Value	VirusTotal	Attached
ipv4	`1.3.1.6`	no local data	2026-05-18 21:20 UTC

Remediations (16)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Security Updates - Red Hat Customer Portal

web:access.redhat.com

Learn about our open source products, services, and company. You are here

2026-06-10 17:04 UTC
Action1: Patch Management and Vulnerability Remediation

web:www.action1.com

Autonomous patch management and vulnerability remediation with a scalable, secure cloud-native platform configurable in 5 minutes — no VPN required.

2026-06-10 17:04 UTC
CVE: Common Vulnerabilities and Exposures

web:www.cve.org

At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures

2026-06-10 17:04 UTC
DSA-2025-034: Security update for Dell Update Package (DUP) Framework ...

web:www.dell.com

Dell Update Package (DUP) Framework remediation is available for a Local Privilege Escalation vulnerability that could be exploited by malicious users to compromise the affected system.

2026-06-10 17:04 UTC
Oracle Critical Patch Update Advisory - January 2025

web:www.oracle.com

This Critical Patch Update contains 318 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at January 2025 Critical Patch Update: Executive Summary and Analysis.

2026-06-10 17:04 UTC
Patch Tuesday - October 2025 - Rapid7

web:www.rapid7.com

Microsoft has published 172 new vulnerabilities, including six zero-day vulnerabilities. Windows 10 moves past the end of support, sort of. Critical RCE in Windows Server Update Service.

2026-06-10 17:04 UTC
Critical Patch Updates, Critical Security Patch Updates ... - Oracle

web:www.oracle.com

Critical Security Patch Updates Critical Security Patch Updates provide security patches for supported Oracle on-premises products. A Critical Security Patch Update provides targeted, high-priority security fixes in a smaller, more focused format, making them easier to apply with minimal disruption.

2026-05-22 06:15 UTC
Microsoft March 2026 Patch Tuesday fixes 2 zero-days, 79 flaws

web:www.bleepingcomputer.com

Today is Microsoft's March 2026 Patch Tuesday with security updates for 79 flaws, including 2 publicly disclosed zero-day vulnerabilities.

2026-05-22 06:15 UTC
I tested Windows 11 March 2026 Updates: Everything new ... - Windows Latest

web:www.windowslatest.com

Windows 11 March 2026 Patch Tuesday update adds Emoji 16.0, Sysmon, network speed test, reliability improvements, and security fixes.

2026-05-22 06:15 UTC
Patch Tuesday May 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-05-22 06:15 UTC
ArcGIS Server Security 2025 Update 2 Patch - Esri

web:www.esri.com

Key highlights The ArcGIS Server Security 2025 update 2 is available This patch resolves 10 Medium severity vulnerabilities This security patch is cumulative, and includes fixes provided in the ArcGIS Server Security 2025 update 1.

2026-05-22 06:15 UTC
Microsoft Patch Tuesday May 2026 - 120 Vulnerabilities Fixed, Including ...

web:cybersecuritynews.com

Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.

2026-05-22 06:15 UTC
A new and improved community patch for BO3. - GitHub

web:github.com

A new and improved community patch for BO3. . Contribute to shiversoftdev/t7patch development by creating an account on GitHub.

2026-05-22 06:15 UTC
Microsoft August 2025 Patch Tuesday - SANS ISC

web:isc.sans.edu

Users should prioritize patching these vulnerabilities to prevent unauthorized code execution. Additionally, the Windows Kerberos Elevation of Privilege Vulnerability ( CVE -2025-53779), a disclosed zero-day, requires high privileges to exploit but could lead to domain administrator access, necessitating careful monitoring and mitigation .

2026-05-22 06:15 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-05-22 06:15 UTC
Android Security Bulletin—November 2025 - Android Open Source Project

web:source.android.com

Android partners are encouraged to fix all issues in this bulletin and use the latest security patch level. Devices that use the 2025-11-01 security patch level must include all issues associated with that security patch level, as well as fixes for all issues reported in previous security bulletins.

2026-05-22 06:15 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2023-28795.json.

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