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ExploitedIn CISA KEVFix available

CVE-2018-7445

Exploitation confirmed. First attested on 2022-09-08 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2018-03-19
  • Fixed in6.41.3
  • WeaknessCWE-119

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A buffer overflow was found in the MikroTik RouterOS SMB service when processing NetBIOS session request messages. Remote attackers with access to the service can exploit this vulnerability and gain code execution on the system. The overflow occurs before authentication takes place, so it is possible for an unauthenticated remote attacker to exploit it. All architectures and all devices running RouterOS before versions 6.41.3/6.42rc27 are vulnerable.

Timeline

dates in UTC
  1. 2018-03-1921:29CVE publishedNVD
  2. 2022-09-08Added to the CISA KEV catalogCISA KEV
  3. 2022-09-08Listed as exploited by GCVEGCVE
  4. 2022-09-08Exploitation first reportedCISA KEV
  5. 2025-02-0716:27SSVC exploitation set to activeCISA-ADP
  6. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-7445?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-7445?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Mikrotik routeros
BranchAffectedFixed in
6.41< 6.41.36.41.3
6.42= 6.42no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Mikrotik routeros to 6.41.3
  2. CISA’s required action: Apply updates per vendor instructions.due 2022-09-29

Detection

read 2026-10-23 19:23 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-44290
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

CISA Known Exploited Vulnerability

Date Added
2022-09-08
Patch Due Date
2022-09-29
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2018-03-19
Last Modified
2026-06-17
NVD status
Analyzed

Frequently asked questions

What is CVE-2018-7445?

A buffer overflow was found in the MikroTik RouterOS SMB service when processing NetBIOS session request messages. Remote attackers with access to the service can exploit this vulnerability and gain code execution on the system. The overflow occurs before authentication takes place, so it is possible for an unauthenticated remote attacker to exploit it. All architectures and all devices running RouterOS before versions 6.41.3/6.42rc27 are vulnerable.

Is CVE-2018-7445 actively exploited?

Yes. CVE-2018-7445 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-09-29.

What is the CVSS score for CVE-2018-7445?

CVE-2018-7445 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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