CVE-2018-14847

Exp

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.

Published: 2018-08-02 Last update: 2025-11-07 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-14847 is rated Critical Active Threat (98.8/100): CVSS Critical severity, with high exploitation likelihood (EPSS 96.09%, 100th percentile). CISA KEV confirms active exploitation (added 2021-12-01) affecting MikroTik / RouterOS. a weakness (CWE-22) Unauthenticated remote administrative access may be possible. EPSS rose +2.44% over the last day, indicating growing attacker interest. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2018-14847

Name: MikroTik Router OS Directory Traversal Vulnerability · CISA KEV detail

Exploit added: 2021-12-01

Action due: 2022-06-01

Required action: Apply updates per vendor instructions.

Public exploit references (Exploit-DB) for CVE-2018-14847

EDB-ID Source Kind Published Link
45578 exploit_db edb 2018-10-10 Exploit-DB ↗
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Exploit prediction scoring system (EPSS) score for CVE-2018-14847

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 93.64% 96.09% +2.44%
2 2026-05-24 93.36% 93.64% +0.28%
3 2026-05-22 — 93.36% —

Full EPSS history (34 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-14847

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 5.2 [email protected]
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 5.2 134c704f-9b21-4f2e-91b3-4a467353bcc0
6.4 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 4.9 [email protected]

Weakness enumeration for CVE-2018-14847

Affected software / configurations for CVE-2018-14847

Vendor Product Version Raw CPE
mikrotik routeros <= 6.42 cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*

References for CVE-2018-14847

URL Tags
https://github.com/BasuCert/WinboxPoC Exploit Mitigation Third Party Advisory
https://github.com/BigNerd95/WinboxExploit Exploit Mitigation Third Party Advisory
https://github.com/tenable/routeros/blob/master/bug_hunting_in_routeros_derbycon_2018.pdf Broken Link Exploit Third Party Advisory
https://github.com/tenable/routeros/tree/master/poc/bytheway Exploit Third Party Advisory
https://github.com/tenable/routeros/tree/master/poc/cve_2018_14847 Exploit Third Party Advisory
https://mikrotik.com/supportsec/winbox-vulnerability Vendor Advisory
https://n0p.me/winbox-bug-dissection/ Exploit Third Party Advisory
https://www.exploit-db.com/exploits/45578/ Exploit Third Party Advisory VDB Entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-14847 US Government Resource
cvelogic Threat Intelligence