---
id: CVE-2026-101039
title: A vulnerability was identified in FAST FAC1900R 20190827_2.0.2
summary: >-
  A vulnerability was identified in FAST FAC1900R 20190827_2.0.2. Affected by
  this issue is the function copy_msg_element of the component devdiscover
  Service. Such manipulation leads to stack-based buffer overflow. The attack
  can be execu…
severity: critical
cvss: 10
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-119
  - CWE-121
vendor: FAST
product: FAC1900R
affected:
  - FAC1900R 20190827_2.0.2
published: '2026-09-28'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T15:16:04.793'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101039'
references:
  - url: >-
      https://github.com/xiaobor123/vuls-find-VxWorks/tree/main/vul-find-FAST_FAC1900R-copy_msg_element(2)
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-101039'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/927251'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/410907'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/410907/cti'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-28T12:44:58.090630Z'
ingestedAt: '2026-09-28T11:08:06.672Z'
epss: 0.00743
epssPercentile: 0.54525
---

## Overview

A vulnerability was identified in FAST FAC1900R 20190827_2.0.2. Affected by this issue is the function copy_msg_element of the component devdiscover Service. Such manipulation leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.