# CVE-2026-102144 — Kiteworks Email Protection Gateway

> As of 2026-10-01, CVE-2026-102144 is a MEDIUM-severity vulnerability in Kiteworks Email Protection Gateway, CVSS v3.1 5.3, EPSS 0.3% (27.7th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-102144, 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-2026-102144?

A resource exhaustion vulnerability in Kiteworks Email Protection Gateway allowed an unauthenticated remote attacker to repeatedly trigger a comparatively expensive server-side operation, causing a partial denial of service.

The record classifies CVE-2026-102144 under weakness classes [CWE-306](https://intel.threadlinqs.com/cwe/CWE-306), [CWE-400](https://intel.threadlinqs.com/cwe/CWE-400). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 5 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 5.3 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 27.7% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.8/10 — 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-2026-102144 being exploited?

No public exploitation evidence for CVE-2026-102144 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-10-01. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

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

## How to fix CVE-2026-102144

No vendor patch reference has been recorded for CVE-2026-102144 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-2026-102144

1 tracked threat in the Threadlinqs corpus references CVE-2026-102144, 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, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-10-05. This product uses the NVD API but is not endorsed or certified by the NVD.

**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-wwhf-5862-rjxq)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-102144
Full detection coverage and IOCs for threats exploiting CVE-2026-102144 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp