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CVE-2018-14847

9.1, critical Known exploited

MikroTik Router OS Directory Traversal Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
9.1, critical critical CVSS v3.1
EPSS, next 30 days
96% higher than 99.8% of scored CVEs
Exploitation
Confirmed in the wild
Published
2 Aug 20188 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 1 Dec 2021. US federal agencies had to remediate by 1 Jun 2022, a deadline that has passed.

Required action. Apply updates per vendor instructions.

Description

MikroTik RouterOS through 6.42 allows unauthenticated remote attackers to read arbitrary files and remote authenticated attackers to write arbitrary files due to a directory traversal vulnerability in the WinBox interface.

Details

Vendor
MikroTik
Product
Routeros
Weakness
CWE-22 (opens in a new tab)
Status
Analyzed
Updated
17 Jun 2026
Assigner
cve@mitre.org

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

References 9

Exploit code 7

Advisories 1

Other references 1

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-2018-7445 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
  • CVE-2026-67281 Mikrotik RouterOS Path Traversal Vulnerability EPSS 0.7% 7.5, high

Beyond this page

Is CVE-2018-14847 in your network?

This page tells you how dangerous CVE-2018-14847 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.

CVE-2018-14847 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2018-14847 comes with the devices to patch.

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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.