What is the CVSS score of CVE-2021-47759?

CVE-2021-47759 has a CVSS 3.1 base score of 6.2 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

Which versions of Windows are affected by CVE-2021-47759?

Organizations using MTPutty 1.0.1.21 should be aware of moderate risk from CVE-2021-47759 rated CVSS 6.2. Exploitation could compromise the security of affected deployments.

Is there a public PoC exploit available for CVE-2021-47759?

Yes, a public proof-of-concept exploit is available for CVE-2021-47759. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2021-47759?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Windows CVE-2021-47759

MEDIUM

Insufficiently Protected Credentials (CWE-522)

2026-01-15 disclosure@vulncheck.com

Windows SSH Information Disclosure

6.2

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.2 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 16, 2026 - 15:55 vuln.today

Public exploit code

CVE Published

Jan 15, 2026 - 16:16 nvd

MEDIUM 6.2

DescriptionCVE.org

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 command line of MTPutty processes, exposing plaintext SSH credentials.

AnalysisAI

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. [CVSS 6.2 MEDIUM]

Technical ContextAI

Classified as CWE-522 (Insufficiently Protected Credentials). 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 command line of MTPutty processes, exposing plaintext SSH credentials.

Affected ProductsAI

MTPutty 1.0.1.21 contains a sensitive information disclosure vulnerability that allows local attackers to view SSH connection passwords through Window