H3C Magic NX15 usrlist sub_416874 stack-based overflow

published 2026-10-19 20 d ago modified 2026-10-20 19 d ago also EUVD-2026-104672

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits: 0; none known

A security vulnerability has been detected in H3C Magic NX15 NX15V100R017. This impacts the function sub_416874 of the file /usr/bin/usrlist. Such manipulation leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 19 d ago (2026-10-20)

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/XxingGoD/H3C-NX15-R017-Vulns/tree/main/H3C/NX15R017/usrlist_stack_overflow_dos referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	7.1	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:X/RC:R
CNA	3.0	6.5	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:X/RC:R
CNA	2.0	6.8	AV:N/AC:L/Au:S/C:N/I:N/A:C/E:POC/RL:ND/RC:UR
CNA	4.0	5.7	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/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	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA	2.0	6.8	AV:N/AC:L/Au:S/C:N/I:N/A:C

Affected products

H3C Magic NX15

Classification

Weakness

CWE-121 Stack-based Buffer Overflow
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

github.com /XxingGoD/H3C-NX15-R017-Vulns/tree/main/H3C/NX15R017/usrlist_stack_overflow_dos
exploit
vuldb.com /vuln/422421
vdb-entry, technical-description
vuldb.com /vuln/422421/cti
signature, permissions-required
vuldb.com /cve/CVE-2026-112373
third-party-advisory
vuldb.com /submit/983540
third-party-advisory

Sources

CVE List CVE-2026-112373
NVD CVE-2026-112373

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary