PuTTY 0.72 before 0.84 has a double free in RSA KEX.

PuTTY 0.77 before 0.84 uses a copy of the PuTTY icon as a trust indication for TELNET data but the trust status is not cleared between proxy authentication and the main session.

PuTTY 0.71 before 0.84 has an assertion failure in ECDSA signature verification.

A vulnerability was detected in PuTTY 0.83. Affected is the function eddsa_verify of the file crypto/ecc-ssh.c of the component Ed25519 Signature Handler. The manipulation results