---
id: CVE-2016-20045
title: >-
  HNB Organizer 1.9.18-10 contains a local buffer overflow vulnerability that
  allows local attackers to execute arbitrary code by supplying an oversized
  argument to the -rc command-line parameter
summary: >-
  HNB Organizer 1.9.18-10 contains a local buffer overflow vulnerability that
  allows local attackers to execute arbitrary code by supplying an oversized
  argument to the -rc command-line parameter. Attackers can craft a malicious
  input stri…
severity: high
cvss: 8.4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-787
vendor: hnb_project
product: hierarchical_notebook
affected:
  - hierarchical_notebook <= 1.9.18-10
published: '2026-03-28'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T08:10:00.200'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2016-20045'
references:
  - url: 'http://hnb.sourceforge.net/'
    label: disclosure@vulncheck.com
  - url: 'https://www.exploit-db.com/exploits/40025'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/hnb-organizer-10-local-buffer-overflow-via-rc-parameter
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00206
epssPercentile: 0.09676
ingestedAt: '2026-10-07T08:20:03.907Z'
---

## Overview

HNB Organizer 1.9.18-10 contains a local buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an oversized argument to the -rc command-line parameter. Attackers can craft a malicious input string exceeding 108 bytes containing shellcode and a return address to overwrite the stack and achieve code execution.

## Affected

- `hierarchical_notebook <= 1.9.18-10`

## Remediation

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