CVE-2023-37250: Unity Parsec has a TOCTOU race condition that permits local attackers to escalate privileges to SYSTEM if Pars

Q: How do I fix CVE-2023-37250?

parsec: upgrade to 9.0. Exact commands for each OS are on this page.

Q: Is CVE-2023-37250 being exploited?

CVE-2023-37250 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-37250 affect?

CVE-2023-37250 affects parsec. Severity is high (CVSS 7.0). Unity Parsec has a TOCTOU race condition that permits local attackers to escalate privileges to SYSTEM if Parsec was installed in "Per User" mode. The application intentionally launches DLLs from a user-owned directory but intended to alway

Routine

HIGH 7.0UPGRADE

CVE-2023-37250 is a high-severity flaw (CVSS 7.0) affecting parsec. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Unity Parsec has a TOCTOU race condition that permits local attackers to escalate privileges to SYSTEM if Parsec was installed in "Per User" mode. The application intentionally launches DLLs from a user-owned directory but intended to always perform integrity verification of those DLLs. This affects Parsec Loader versions through 8. Parsec Loader 9 is a fixed version.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.0 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-367
Published	2023-08-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: unity

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

Am I affected?

Timeline

2023-08-20 08:15 UTCPublished CVE record published
2026-06-17 06:07 UTCUpdated Record last modified

unity parsec UPGRADE

Affected: < 9.0

Fixed in: 9.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 9.0 (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.

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-2023-37250?

parsec: upgrade to 9.0. Exact commands for each OS are on this page.

Is CVE-2023-37250 being exploited?

CVE-2023-37250 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-2023-37250 affect?

CVE-2023-37250 affects parsec. Severity is high (CVSS 7.0). Unity Parsec has a TOCTOU race condition that permits local attackers to escalate privileges to SYSTEM if Parsec was installed in "Per User" mode. The application intentionally launches DLLs from a user-owned directory but intended to alway

How urgent is CVE-2023-37250?

Priority 30/100. High severity

Software pages

Unity vulnerabilities

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References

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