Buffer overflow in Hnb
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (9.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Hnb — versions 1.9.18-10
- Hnb Project Hierarchical Notebook
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/40025 (Exploit, VDB Entry, exploit)
- hnb.sourceforge.net/ (Product, product)
- www.vulncheck.com/advisories/hnb-organizer-10-local-buffer-overflow-via-rc-para… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2016-20045?
- CVE-2016-20045 is a high-severity vulnerability in Hnb, classified under Out-of-bounds Write. CVSS score: 8.4/10. Published 2026-03-28.
- How severe is CVE-2016-20045?
- High severity. CVSS v3 base score is 8.4 out of 10.