CVE-2018-14847

CVE-2018-14847 is a critical-severity vulnerability in Mikrotik Routeros with a CVSS 3.x base score of 9.1. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2021-12-01). The underlying weakness is classified as CWE-22.

Key facts

• Severity: Critical (CVSS 3.x base score 9.1)
• CVSS v2: 6.4
• EPSS exploit prediction: 96% (100th percentile)
• Actively exploited: Yes — listed in CISA KEV (added 2021-12-01)
• EU (EUVD) id: EUVD-2018-6729
• EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2021-12-01)
• Weakness: CWE-22
• Affected product: Mikrotik Routeros
• Published: 2018-08-02
• Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2018-14847?

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.

How severe is CVE-2018-14847?

CVE-2018-14847 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2018-14847 being actively exploited?

Yes. CVE-2018-14847 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-12-01, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2018-14847?

CVE-2018-14847 affects Mikrotik Routeros. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-14847?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2018-14847 have an EU (EUVD) identifier?

Yes. CVE-2018-14847 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-6729. It is also flagged as exploited in the EUVD (since 2021-12-01).

When was CVE-2018-14847 published?

CVE-2018-14847 was published on 2018-08-02 and last updated on 2026-06-17.

References

• https://github.com/BasuCert/WinboxPoC
• https://github.com/BigNerd95/WinboxExploit
• https://github.com/tenable/routeros/blob/master/bug_hunting_in_routeros_derbycon_2018.pdf
• https://github.com/tenable/routeros/tree/master/poc/bytheway
• https://github.com/tenable/routeros/tree/master/poc/cve_2018_14847
• https://mikrotik.com/supportsec/winbox-vulnerability
• https://n0p.me/winbox-bug-dissection/
• https://www.exploit-db.com/exploits/45578/
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-14847

Affected products (1)

• cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*

More vulnerabilities in Mikrotik Routeros

• CVE-2026-86060 — Critical (CVSS 9.8): RouterOS contains an argument-handling flaw in the SSH login path involving usernames that begin with a prohibited…
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• CVE-2022-34960 — Critical (CVSS 9.8): The container package in MikroTik RouterOS 7.4beta4 allows an attacker to create mount points pointing to symbolic…
• CVE-2018-7445 — Critical (CVSS 9.8): A buffer overflow was found in the MikroTik RouterOS SMB service when processing NetBIOS session request messages.…
• CVE-2026-67278 — Critical (CVSS 9.1): MikroTik RouterOS accepts malformed RSA/PKCS#1 v1.5 signatures across RSA-based services, including TLS/X.509…
• CVE-2023-30799 — Critical (CVSS 9.1): MikroTik RouterOS stable before 6.49.7 and long-term through 6.48.6 are vulnerable to a privilege escalation issue. A…

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• CVE-2026-80155 — Critical (CVSS 10.0): Lantronix SLC8000 before firmware v9.7.0.5, SLC9000 before firmware v9.7.0.2, EMG8500/EMG7500 before firmware v9.7.0.1,…
• CVE-2026-70200 — Critical (CVSS 10.0): Improper limitation of a pathname to a restricted directory ('path traversal') in Azure Logic Apps allows an…
• CVE-2026-85706 — Critical (CVSS 10.0): GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.7 before 18.11.12, 19.0 before 19.0.9,…
• CVE-2026-76606 — Critical (CVSS 10.0): Joomla Extension - fabrikar.com - Path Traversal via image element in Fabrik < 4.7.2.

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Threat intelligence

Threat-intel indicators referencing this CVE:

• 35.130.111.98 (ipv4-addr)
• 196.202.111.134 (ipv4-addr)
• 203.130.248.214 (ipv4-addr)
• 181.210.16.154 (ipv4-addr)
• 41.139.187.217 (ipv4-addr)
• 186.16.210.130 (ipv4-addr)
• 89.216.49.219 (ipv4-addr)
• 85.185.103.231 (ipv4-addr)