TECSON/GOK: Improper Authentication and Access Control on multiple devices

published 2022-05-06 4 y ago modified 2026-06-17 4 mo ago also EUVD-2019-3896

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits: 0; none known

In multiple Tecson Tankspion and GOKs SmartBox 4 products the affected application doesn't properly restrict access to an endpoint that is responsible for saving settings, to a unauthenticated user with limited access rights. Based on the lack of adequately implemented access-control rules, by accessing a specific uniform resource locator (URL) on the web server, a malicious user is able to change the application settings without authenticating at all, which violates originally laid ACL rules.

Patch / fix

fixed in 5

TECSON e-litro net V6.32
TECSON LX-Net V6.32
TECSON LX-Q-Net V6.32
GOK SmartBox 4 LAN V6.3
GOK SmartBox 4 LAN PRO V6.3

Exploit prediction

1.29% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

TECSON e-litro net
TECSON LX-Net
TECSON LX-Q-Net
GOK SmartBox 4 LAN
GOK SmartBox 4 LAN PRO

Classification

Weakness

CWE-287 Improper Authentication

References

cert.vde.com /en/advisories/VDE-2019-012/
third-party-advisory

Sources

CVE List CVE-2019-12254
NVD CVE-2019-12254

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