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Vulnerability record · CVE-2016-20045 · published 28 March 2026

CVE-2016-20045: Hnb project hierarchical notebook out-of-bounds write vulnerability

HHnb Project · Hierarchical Notebook

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.

8.6 CVSS 4.0 High EPSS 0.21% · top 90.5% CWE-787 · Out-of-bounds write
8.6CVSS 4.0 base score
0.21%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://hnb.sourceforge.net/ Product
https://www.exploit-db.com/exploits/40025 ExploitVDB Entry
https://www.vulncheck.com/advisories/hnb-organizer-10-local-buffer-overflow-via-rc-parameter Third Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2016-20045), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.