What is CVE-2021-47759?

CVE-2021-47759 is a medium-severity vulnerability in Ttyplus Mtputty, classified under Insufficiently Protected Credentials. CVSS score: 6.2/10. Published 2026-01-15.

How severe is CVE-2021-47759?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Vulnerability in Ttyplus Mtputty

CVE-2021-47759

MTPutty 1.0.1.21 contains a sensitive information disclosure vulnerability that allows local attackers to view SSH connection passwords through Windows PowerShell process listing. Attackers can run a PowerShell command to retrieve the full…

EPSS: 0.001 (0.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Ttyplus Mtputty — versions 1.0.1.21

Weakness classification (CWE)

CWE-522 — Insufficiently Protected Credentials

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)

Frequently asked questions

What is CVE-2021-47759?: CVE-2021-47759 is a medium-severity vulnerability in Ttyplus Mtputty, classified under Insufficiently Protected Credentials. CVSS score: 6.2/10. Published 2026-01-15.
How severe is CVE-2021-47759?: Medium severity. CVSS v3 base score is 6.2 out of 10.