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TI-2019-02986 Aliases CVE-2019-3981GHSA-pg5r-4rf5-r7hv

MikroTik Winbox 3.20 and below is vulnerable to man in the middle attacks.

Priority LOW 20CWE-300Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

MikroTik Winbox 3.20 and below is vulnerable to man in the middle attacks. A man in the middle can downgrade the client's authentication protocol and recover the user's username and MD5 hashed password.

Why it matters now

EPSS 0.01141 66th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MikroTikWinBoxWinbox 3.20 and below.—No fix listedCNA
  • WinBox VendorMikroTik Affected Winbox 3.20 and below. Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:mikrotik:routeros:*:*:*:*:-:*:*:*before 6.43VulnerableMikroTik
cpe:2.3:o:mikrotik:winbox:*:*:*:*:*:*:*:*before 3.20VulnerableMikroTik
  • cpe:2.3:o:mikrotik:routeros:*:*:*:*:-:*:*:* Versions before 6.43 Vulnerable ·MikroTik
  • cpe:2.3:o:mikrotik:winbox:*:*:*:*:*:*:*:* Versions before 3.20 Vulnerable ·MikroTik

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-3981
  2. 2026-10-03 Alias added: GHSA-pg5r-4rf5-r7hv

References

Exploit 1

  • TI-2018-05369 A buffer overflow was found in the MikroTik RouterOS SMB service when processing NetBIOS… KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-58872 SSH session privilege manipulation via a crafted username in Mikrotik RouterOS KEVCVSS 4.0CRITICAL 9.2
  • TI-2018-10669 MikroTik RouterOS through 6.42 allows unauthenticated remote attackers to read arbitrary… KEVCVSS 3.1CRITICAL 9.1
  • TI-2026-47574 Kernel memory disclosure and denial of service in MikroTik RouterOS btest service KEVCVSS 4.0HIGH 8.8
  • TI-2026-47576 SSH Pre-Authentication Rekey State Bypass in MikroTik RouterOS KEVCVSS 4.0MEDIUM 6.9
  • TI-2022-22302 Out-of-bounds read in MicroTik RouterOS CVSS 3.1CRITICAL 9.8
See all 87 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences