# CVE-2026-102146 — Kiteworks Email Protection Gateway

> As of 2026-10-01, CVE-2026-102146 is a MEDIUM-severity vulnerability in Kiteworks Email Protection Gateway, CVSS v3.1 6.5, EPSS 0.3% (23.9th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-102146, most recently “Kiteworks 9.5.1 Patches 126 Vulnerabilities Including Critical Account Takeover in Core and Email Protection Gateway (CVE-2026-102147, CVE-2026-102149)”.

**Last updated:** 2026-10-01

## What is CVE-2026-102146?

An authenticated Email Protection Gateway administrator holding only limited, delegated permissions could write files with attacker-controlled content to arbitrary locations accessible to the Email Protection Gateway service account. This exceeds the administrator's intended privileges and could be used to alter application files and configuration or to disrupt the availability of the service.

The record classifies CVE-2026-102146 under weakness class [CWE-73](https://intel.threadlinqs.com/cwe/CWE-73). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs high-privilege credentials, needs no user interaction, and has high impact on integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 25 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 6.5 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 23.9% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-30, last modified 2026-10-01

## Is CVE-2026-102146 being exploited?

It currently carries a trending score of 38 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Kiteworks](https://intel.threadlinqs.com/vendors/kiteworks): Email Protection Gateway

## How to fix CVE-2026-102146

No vendor patch reference has been recorded for CVE-2026-102146 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-102146

1 tracked threat in the Threadlinqs corpus references CVE-2026-102146, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Kiteworks 9.5.1 Patches 126 Vulnerabilities Including Critical Account Takeover in Core and Email Protection Gateway (CVE-2026-102147, CVE-2026-102149)](https://intel.threadlinqs.com/threat/TL-2026-2902) — CRITICAL · 2026-10-02

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-10-10.

**Third-party advisory**

- [raw.githubusercontent.com — third party advisory](https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json)

**Other references**

- [github.com](https://github.com/kiteworks/security-advisories/security/advisories/GHSA-5pgq-v8g2-rg2f)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-102146
Full detection coverage and IOCs for threats exploiting CVE-2026-102146 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp