CVE-2025-62514: Parsec.cloud Parsec

High severity, CVSS 7.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Parsec is a cloud-based application for cryptographically secure file sharing. In versions on the 3.x branch prior to 3.6.0, `libparsec_crypto`, a component of the Parsec application, does not check for weak order point of Curve25519 when compiled with its RustCrypto backend. In practice this means an attacker in a man-in-the-middle position would be able to provide weak order points to both parties in the Diffie-Hellman exchange, resulting in a high probability to for both parties to obtain the same shared key (hence leading to a successful SAS code exchange, misleading both parties into thinking no MITM has occurred) which is also known by the attacker. Note only Parsec web is impacted (as Parsec desktop uses `libparsec_crypto` with the libsodium backend). Version 3.6.0 of Parsec patches the issue.

Affected products

• Parsec.cloud Parsec: from 3.0.0, before 3.6.0 (fixed in 3.6.0)

Published 2026-01-29. Last modified 2026-06-17.