What’s Vulnerable › Vulnerabilities

CVE-2016-20045: HNB Organizer 1.9.18-10 Local Buffer Overflow via -rc Parameter

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-28 · updated 2026-10-07
• Weakness: CWE-787

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.

Affected products

• Hnb Project Hierarchical Notebook: through 1.9.18-10

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

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