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Exploited vulnerability · CISA KEV

Is CVE-2018-14847 exploited? Yes: in CISA KEV since 1 Dec 2021

Gociux · MikroTik RouterOS · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2018-14847, MikroTik Router OS Directory Traversal Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 1 Dec 2021, 1217 days after it was published. It affects MikroTik RouterOS. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 1 Dec 2021
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity9.1CVSS 3.1 · critical
US federal due1 Jun 2022BOD 22-01 deadline

What it is

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.

VendorMikroTik (5 exploited CVEs in KEV)
ProductRouterOS
VulnerabilityMikroTik Router OS Directory Traversal Vulnerability
WeaknessCWE-22
Published2 Aug 2018
Added to KEV1 Dec 2021
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for RouterOS in your asset inventory, including appliances and cloud images. Stack check lists every exploited MikroTik CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 2 Aug 2018.
  4. Get told next time. Email alerts when CISA adds a CVE for MikroTik.

Other exploited CVEs in RouterOS

References

Questions

Is CVE-2018-14847 being exploited?

Yes. CISA added CVE-2018-14847 to the Known Exploited Vulnerabilities catalog on 1 Dec 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2018-14847 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2018-14847?

Apply updates per vendor instructions. Check MikroTik's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected RouterOS and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in December 2021 · MikroTik scorecard · act-now radar.

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