FNKvision FNK-GU2 MD5 shadow risky encryption

published 2025-07-09 16 mo ago modified 2026-10-18 21 d ago also EUVD-2025-20782

cvss: 1.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits: 0; none known

A vulnerability classified as problematic was found in FNKvision FNK-GU2 up to 40.1.7. Affected by this vulnerability is an unknown functionality of the file /etc/shadow of the component MD5. The manipulation leads to risky cryptographic algorithm. It is possible to launch the attack on the physical device. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 16 mo ago (2025-07-09)

Exploit prediction

0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

medium.com https://medium.com/@pundhapat/sqli-in-the-cloud-root-on-the-board-a-beginners-journey-into-iot-hacking-06efb2539a21 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	1.0	CVSS:4.0/AV:P/AC:H/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
CNA	3.1	1.6	CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
CNA	3.0	1.6	CVSS:3.0/AV:P/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
CNA	2.0	0.8	AV:L/AC:H/Au:M/C:P/I:N/A:N/E:POC/RL:ND/RC:UR
CNA	4.0	0.3	CVSS:4.0/AV:P/AC:H/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/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	1.6	CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N
CNA	2.0	0.8	AV:L/AC:H/Au:M/C:P/I:N/A:N

Affected products

FNKvision FNK-GU2

Classification

Weakness

CWE-327 Use of a Broken or Risky Cryptographic Algorithm
CWE-310 Cryptographic Issues

References

medium.com /@pundhapat/sqli-in-the-cloud-root-on-the-board-a-beginners-journey-into-iot-hacking-06efb2539a21
exploit
vuldb.com /?id.315163
vdb-entry
vuldb.com /?ctiid.315163
signature, permissions-required
vuldb.com /?submit.608027
third-party-advisory

Sources

CVE List CVE-2025-7214
NVD CVE-2025-7214

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