PuTTY software is a popular software. The software has versions of the Windows and UNIX operating systems. A new version of the software was recently released, 0.71, which includes a number of security updates.

Details:

The fixed vulnerabilities could allow denial of service attacks, sensitive information leakage and even running of remote code.

Ways of handling:

It is recommended that you update to the new version on your systems as soon as possible –

https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html