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CVE-2019-3981

15
FAUCET Score

CVE-2019-3981 describes a man-in-the-middle vulnerability in MikroTik Winbox 3.20 and earlier, allowing an attacker to downgrade authentication protocols and capture user credentials. This vulnerability has a low severity CVSS score of 3.7, indicating low impact on confidentiality and no impact on integrity or availability, with a high attack complexity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.43CPE matchmatch criteria
cpe:2.3:o:mikrotik:routeros:*:*:*:*:-:*:*:*
< 3.20CPE matchmatch criteria
cpe:2.3:o:mikrotik:winbox:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.7LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.14%
Probability of exploitation in next 30 days
EPSS Percentile
63.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0114 is in the 42nd percentile among its peer group of 1,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (5)

boschvendor investigatingvia llm_extracted
maxkbvendor investigatingvia llm_extracted
naturalintelligencevendor investigatingvia llm_extracted
netgearvendor investigatingvia llm_extracted
opnsensevendor investigatingvia llm_extracted

Vendor Advisories (5)

netgearllm-netgear-79171d0f16104142MEDIUM

MikroTik WinBox Man-in-the-Middle Password Hash Disclosure

Jan 14, 2020
maxkbllm-maxkb-ec839c2c03b1371aMEDIUM

MikroTik WinBox Man-in-the-Middle Password Hash Disclosure

Jan 14, 2020
boschllm-bosch-233a9c10e9be1152MEDIUM

MikroTik WinBox Man-in-the-Middle Password Hash Disclosure

Jan 14, 2020
opnsensellm-opnsense-d0137f0ab0022729MEDIUM

MikroTik WinBox Man-in-the-Middle Password Hash Disclosure

Jan 14, 2020
naturalintelligencellm-naturalintelligence-f4dcb53420c0ed46MEDIUM

MikroTik WinBox Man-in-the-Middle Password Hash Disclosure

Jan 14, 2020

References

tenable.com / security/research/tra-2020-01
ExploitThird Party Advisory