Is CVE-2016-20012 in the CISA KEV catalog?

No. CVE-2016-20012 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-20012?

CVE-2016-20012 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2016-20012?

CVE-2016-20012 has an EPSS score of 5.04% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2016-20012?

No published fix for CVE-2016-20012 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2016-20012

MEDIUMEPSS 91th pctl

5.3

CVSS v3

NVD

Description

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

CWE-203

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

5.04%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Patch1

github.com

Exploit2

Third-Party Advisory5

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-29.