---
id: CVE-2026-101038
title: A vulnerability was determined in FAST FAC1200R 5.0_20201119_1.0.2
summary: >-
  A vulnerability was determined in FAST FAC1200R 5.0_20201119_1.0.2. Affected
  by this vulnerability is the function MmtAtePrase of the component MmtAtePrase
  Parser. This manipulation causes stack-based buffer overflow. Remote
  exploitation…
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-119
  - CWE-121
vendor: FAST
product: FAC1200R
affected:
  - FAC1200R 5.0_20201119_1.0.2
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-2026-101038'
references:
  - url: >-
      https://github.com/xiaobor123/vuls-find-VxWorks/tree/main/vul-find-FAST_FAC1200R-twlantask-MmtAtePrase-stack-overflow(1)/vul-find-FAST_FAC1200R-twlantask-MmtAtePrase-stack-overflow
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-101038'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/927237'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/410906'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/410906/cti'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-28T10:53:19.744257Z'
ingestedAt: '2026-09-28T11:08:06.671Z'
epss: 0.00445
epssPercentile: 0.38549
---

## Overview

A vulnerability was determined in FAST FAC1200R 5.0_20201119_1.0.2. Affected by this vulnerability is the function MmtAtePrase of the component MmtAtePrase Parser. This manipulation causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. 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.