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Vulnerability record · CVE-2018-19879 · published 28 March 2019

CVE-2018-19879: Teltonika rut950 firmware improper restriction of authentication attempts vulnerability

TTeltonika · Rut950 Firmware

An issue was discovered in /cgi-bin/luci on Teltonika RTU9XX (e.g., RUT950) R_31.04.89 before R_00.05.00.5 devices. The authentication functionality is not protected from automated tools used to make login attempts to the application. An anonymous attacker has the ability to make unlimited login attempts with an automated tool. This ability could lead to cracking a targeted user's password.

9.8 CVSS 3.0 Critical EPSS 1.3% · top 31.6% CWE-307 · Improper restriction of authentication attempts
9.8CVSS 3.0 base score, v2 5.0
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue was discovered in /cgi-bin/luci on Teltonika RTU9XX (e.g., RUT950) R_31.04.89 before R_00.05.00.5 devices. The authentication functionality is not protected from automated tools used to make login attempts to the application. An anonymous attacker has the ability to make unlimited login attempts with an automated tool. This ability could lead to cracking a targeted user's password.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://wiki.teltonika.lt/index.php?title=RUT9xx_Firmware Vendor Advisory
https://www.triadsec.com/CVE-2018-19879.pdf ExploitThird Party Advisory
https://wiki.teltonika.lt/index.php?title=RUT9xx_Firmware Vendor Advisory
https://www.triadsec.com/CVE-2018-19879.pdf ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2018-17532Teltonika RUT9XX routers unauthenticated OS command injectionTeltonika RUT9XX routers running firmware before 00.04.233 fail to sanitize user input in autologin.cgi and hotspotlogin.cgi, allowing OS command inj…EPSS 71%analysed9.8CVE-2017-8116Teltonika rut900 firmware os command injection vulnerabilityThe management interface for the Teltonika RUT9XX routers (aka LuCI) with firmware 00.03.265 and earlier allows remote attackers to execute arbitrary…EPSS 4.5%6.8CVE-2018-17534Teltonika rut900 firmware improper authentication vulnerabilityTeltonika RUT9XX routers with firmware before 00.04.233 provide a root terminal on a serial interface without proper access control. This allows atta…EPSS 0.72%6.5CVE-2018-19878Teltonika rut950 firmware use after free vulnerabilityAn issue was discovered on Teltonika RTU950 R_31.04.89 devices. The application allows a user to login without limitation. For every successful login…EPSS 1.2%6.1CVE-2018-17533Teltonika rut900 firmware cross-site scripting vulnerabilityTeltonika RUT9XX routers with firmware before 00.05.01.1 are prone to cross-site scripting vulnerabilities in hotspotlogin.cgi due to insufficient us…EPSS 2.0%

Source: NIST National Vulnerability Database (record CVE-2018-19879), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.