CVE-2016-20045
CVE-2016-20045 is a high-severity vulnerability in Hnb Project Hierarchical Notebook with a CVSS 3.x base score of 8.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 8.4)
- CVSS v4: 8.6
- EPSS exploit prediction: 0% (11th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2016-10845
- Weakness: CWE-787
- Affected product: Hnb Project Hierarchical Notebook
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2016-20045?
- CVE-2016-20045 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2016-20045 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2016-20045?
- CVE-2016-20045 affects Hnb Project Hierarchical Notebook. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2016-20045?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2016-20045 have an EU (EUVD) identifier?
- Yes. CVE-2016-20045 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2016-10845.
- When was CVE-2016-20045 published?
- CVE-2016-20045 was published on 2026-03-28 and last updated on 2026-06-17.
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
Affected products (1)
- cpe:2.3:a:hnb_project:hierarchical_notebook:*:*:*:*:*:*:*:*
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