HNB Organizer 1.9.18-10 Local Buffer Overflow via -rc Parameter

Published 7 mo ago 2026-03-28 · modified 31 d ago 2026-10-07 · JSON

CVSS

8.4

v3.1 · CNA

CISA KEV

not known exploited

EPSS

0.2%

percentile 11%

Public exploits

none known

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.

CISA SSVC assessment

Exploitation: Proof of concept public
Automatable: no
Technical impact: total
Assessed: 7 mo ago 2026-03-30

Exploit prediction (EPSS)

0.21% probability of exploitation in the next 30 days, higher than 11% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
CNA	4.0	8.6	`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`
CNA	3.1	8.4	`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CNA	4.0	8.6	`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:X/V:X/RE:X/U:X`
CNA	3.1	8.4	`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
NVD	3.1	7.8	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

Affected products

hnb HNB

Classification

Weakness

CWE-787 Out-of-bounds Write

References

exploit-db.com /exploits/40025 · exploit
hnb.sourceforge.net / · product
vulncheck.com /advisories/hnb-organizer-10-local-buffer-overflow-via-rc-parameter · third-party-advisory

Sources

CVE List: CVE-2016-20045
NVD: CVE-2016-20045

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary