CVE-2019-3981

LOWNVD 3.73.7—

3.7

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.

CVSS v3: 3.7
EG Score: 3.7(medium)
EPSS: 55.5%
KEV: Not listed

Published

January 14, 2020

Last Modified

November 21, 2024

References (2)

vulnreport@tenablehttps://www.tenable.com/security/research/tra-2020-01
af854a3a-2127-422b-91ae-364da2661108https://www.tenable.com/security/research/tra-2020-01

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-300

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 09:17 UTCEG score recompute
2026-05-27 09:17 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 16:47 UTCepss_batch

Frequently asked(5)

What is CVE-2019-3981?

CVE-2019-3981 is a low vulnerability published on January 14, 2020. 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.

When was CVE-2019-3981 disclosed?

CVE-2019-3981 was first published in the National Vulnerability Database on January 14, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2019-3981 actively exploited?

CVE-2019-3981 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 55.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-3981?

CVE-2019-3981 has a CVSS v3 base score of 3.7 (NVD).

How do I remediate CVE-2019-3981?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-3981, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2019-3981

📅 Published

🔄 Last Modified

🔗 References (2)