CVE-2019-12254 | TECSON/GOK: Improper Authentication and Access Control on multiple devices

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.

Published: 2022-05-06 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-12254 is rated Moderate Risk (61.2/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.15%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-12254

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.06% 1.15% +0.09%
2 2026-03-17 0.81% 1.06% +0.25%
3 2025-05-17 — 0.81% —

Full EPSS history (15 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-12254

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2019-12254

Affected software / configurations for CVE-2019-12254

Vendor Product Version Raw CPE
gok smartbox_4_lan_firmware — cpe:2.3:o:gok:smartbox_4_lan_firmware:*:*:*:*:*:*:*:*
gok smartbox_4_lan_pro_firmware — cpe:2.3:o:gok:smartbox_4_lan_pro_firmware:*:*:*:*:*:*:*:*
tecson lx-q-net_firmware — cpe:2.3:o:tecson:lx-q-net_firmware:*:*:*:*:*:*:*:*
tecson lx-net_firmware — cpe:2.3:o:tecson:lx-net_firmware:*:*:*:*:*:*:*:*
tecson e-litro_net_firmware — cpe:2.3:o:tecson:e-litro_net_firmware:*:*:*:*:*:*:*:*

References for CVE-2019-12254

URL Tags
https://cert.vde.com/en/advisories/VDE-2019-012/ Third Party Advisory
cvelogic Threat Intelligence