All vulnerabilities

Servers and applications

CVE-2016-20012

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

Severity
Medium 5.3
Published
15 Sept 2021
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSHServers and applications · cpe:a:openbsd:openssh
  • Every version up to 8.7

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2016-20012
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2016-20012