CVE-2021-47759 MTPutty 1.0.1.21 - SSH Password Disclosure
Local attackers can retrieve plaintext SSH passwords from MTPutty processes via PowerShell command line inspection.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-47759?
CVE-2021-47759 is a medium-severity vulnerability in Ttyplus MTPutty, published on 15 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-522
Which versions are affected by CVE-2021-47759?
How do I fix CVE-2021-47759?
No fix has been published for CVE-2021-47759 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-47759 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47759 exists.
Sources
Also known as GHSA-m8x3-28h9-5qc5.