Detections
Analytics

MikroTik RouterOS Path Traversal (CVE-2026-67281)

high Tenable OT Security Plugin ID 506063

Synopsis

The remote OT asset is affected by a vulnerability.

Description

RouterOS WebFig contains an unauthenticated file-read vulnerability in the /jsproxy path where a newly allocated session retains a stale uninitialized principal pointer used for file authorization. An unauthenticated attacker can prepare the allocator so that the file- serving path dereferences this pointer with sufficient rights, then supply parent-directory components in an encrypted URI to escape the WebFig file namespace and disclose root-owned files, including configuration stores containing credentials.This issue affects only 7.x branch was fixed in versions: 7.23.4 (Long-term) and 7.24.2 (Stable)

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

See Also

https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve

https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801

https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800

https://mikrotik.com/supportsec/september-2026-vulnerability/

http://www.nessus.org/u?1fe530bb

http://www.nessus.org/u?eed3942f

Plugin Details

Severity: High

ID: 506063

File Name: tenable_ot_mikrotik_CVE-2026-67281.nasl

Version: 1.2

Type: Remote

Family: Tenable.ot

Published: 10/5/2026

Updated: 10/6/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.59

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N

CVSS Score Source: CVE-2026-67281

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 7.7

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:mikrotik:routeros:7

Required KB Items: Tenable.ot/MikroTik

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/5/2026

Vulnerability Publication Date: 9/5/2026

Reference Information

CVE: CVE-2026-67281

CWE: 22, 824