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CVE-2016-20012

5.3
MEDIUMCVSS v3.1 Base Score
8.65%
LOW RiskEPSS (93rd percentile)
NVD-CWE-Other

OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test whether this suspicion is correct. This occurs because a challenge is sent only when that combination could be valid for a login session. NOTE: the vendor does not recognize user enumeration as a vulnerability for this product

Published: 9/15/2021
Modified: 5/29/2026
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Vulnerability Summary

CVSS v3 Score

5.3MEDIUM

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

CVSS v2 Score

4.3

AV:N/AC:M/Au:N/C:P/I:N/A:N

EPSS Score (Exploitation Probability)

8.65%LOW Exploitation Risk
93rd percentile

This vulnerability has a 8.65% probability of being exploited in the next 30 days, ranking higher than 93% of all scored CVEs.

CWE Classification

NVD-CWE-Other

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