CVE-2016-20045

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

8.6CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 11% of CVEs (scores of 2026-10-25)

CWE

CWE-787

Published

2026-03-28

Modified

2026-10-07

Record from

the NVD, synced 2026-10-19

Affected

• hnb_project:hierarchical_notebook

References

• http://hnb.sourceforge.net/
• https://www.exploit-db.com/exploits/40025
• https://www.vulncheck.com/advisories/hnb-organizer-10-local-buffer-overflow-via-rc-parameter

Check your stackJSON