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.
Advisories

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Fixes

Solution

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Workaround

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History

Fri, 30 Jan 2026 09:00:00 +0000

Type Values Removed Values Added
First Time appeared Scille
Scille parsec-cloud
Vendors & Products Scille
Scille parsec-cloud

Thu, 29 Jan 2026 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 29 Jan 2026 16:00:00 +0000

Type Values Removed Values Added
Description 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.
Title `libparsec_crypto` does not check for weak order point of curve 25519
Weaknesses CWE-1240
CWE-327
References
Metrics cvssV3_1

{'score': 8.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-01-29T21:29:03.456Z

Reserved: 2025-10-15T15:03:28.134Z

Link: CVE-2025-62514

cve-icon Vulnrichment

Updated: 2026-01-29T21:28:58.803Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-01-29T16:16:09.387

Modified: 2026-01-29T16:31:00.867

Link: CVE-2025-62514

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-30T08:43:18Z

Weaknesses