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CVE-2026-67281

7.5, high

Mikrotik RouterOS Path Traversal Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.5, high high CVSS v3.1
EPSS, next 30 days
0.7% higher than 53.1% of scored CVEs
Exploitation
Exploit code published
Published
5 Sept 2026a month ago

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)

Details

Vendor
Mikrotik
Product
RouterOS
Weakness
CWE-22 (opens in a new tab)
Status
Analyzed
Updated
25 Sept 2026
Assigner
cvd@cert.pl

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References 6

Exploit code 1

Advisories 3

Other references 2

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Mikrotik CVEs

Every Mikrotik CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-67277 MikroTik RouterOS Missing Authentication for Critical Function Vulnerability KEV EPSS 2% 8.2, high
  • CVE-2026-67279 Mikrotik RouterOS Improper Enforcement of Behavioral Workflow Vulnerability KEV EPSS 1% 6.5, medium
  • CVE-2026-86060 MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command Vulnerability KEV EPSS 6% 9.8, critical
  • CVE-2018-14847 MikroTik Router OS Directory Traversal Vulnerability KEV EPSS 96% 9.1, critical
  • CVE-2018-7445 MikroTik RouterOS Stack-Based Buffer Overflow Vulnerability KEV EPSS 61% 9.8, critical
  • CVE-2026-67278 MikroTik RouterOS accepts malformed RSA/PKCS#1 v1.5 signatures across RSA-based services, including TLS/X.509 certificate validation and… EPSS 0.3% 9.1, critical
  • CVE-2026-67276 RouterOS does not compare the complete RSA public key when matching an SSH authentication request to an authorized user key, checking… EPSS 6% 8.1, high

Beyond this page

Is CVE-2026-67281 in your network?

This page tells you how dangerous CVE-2026-67281 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.