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Fencer Vulns
critical 9.8

CVE-2018-7445 kev in the critical feed json

A buffer overflow was found in the MikroTik RouterOS SMB service when processing NetBIOS session request messages.

published 2018-03-19 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-19176

cvss
9.8
version 3.1, CNA
cisa kev
Exploited
added 2022-09-08
epss
65.8%
EPSS 65.8% chance of exploitation in 30 days, percentile 99.2%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

cisa required action Apply updates per vendor instructions.

  • mikrotik routeros 6.41.3

Timeline

  1. First public exploit (EDB-44290)
  2. Published
  3. Added to CISA KEV
  4. CISA patch deadline
  5. CISA SSVC: exploitation active

Known exploited

Added
4 y ago
Patch by
2022-09-29 (4 y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
MikroTik, RouterOS
CISA name
MikroTik RouterOS Stack-Based Buffer Overflow Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
21 mo ago

Exploit prediction

65.83% chance of exploitation in the next 30 days, higher than 99.2% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-44290 MikroTik RouterOS < 6.41.3/6.42rc27 - SMB Buffer Overflow remote, 2018-03-15
  • seclists.org http://seclists.org/fulldisclosure/2018/Mar/38 referenced PoC, tagged "exploit" by a source, unverified
  • coresecurity.com https://www.coresecurity.com/advisories/mikrotik-routeros-smb-buffer-overflow referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.