CVE-2025-62514: Parsec is a cloud-based application for cryptographically secure file sharing

This month

HIGH 8.3UPGRADE

CVE-2025-62514 is a high-severity flaw (CVSS 8.3) affecting parsec. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-327, CWE-1240
Published	2026-01-29
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: parsec.cloud

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-29 16:16 UTCPublished CVE record published
2026-06-17 09:52 UTCUpdated Record last modified

parsec.cloud parsec UPGRADE

Affected: >= 3.0.0 and < 3.6.0

Fixed in: 3.6.0

Safe to downgrade to: a release before 3.0.0

1. Check installed version

apt-cache policy parsec || rpm -q parsec || parsec --version

2. UPGRADE to 3.6.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade parsec

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade parsec

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.0.0 (Debian / Ubuntu)

apt-cache madison parsec sudo apt install parsec=<VERSION_BEFORE_3.0.0> sudo apt-mark hold parsec

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list parsec sudo dnf downgrade parsec-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add parsec

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-62514?

parsec: upgrade to 3.6.0. Exact commands for each OS are on this page.

Is CVE-2025-62514 being exploited?

CVE-2025-62514 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-62514 affect?

CVE-2025-62514 affects parsec. Severity is high (CVSS 8.3). 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 c

How urgent is CVE-2025-62514?

Priority 40/100. High severity; Public exploit reference

References

← Back to latest CVEs