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CVE-2023-37250

HighPublished

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...

Published: Aug 20, 2023
Updated: Oct 8, 2024
Assigning CNA: mitre
Evidence observed: Aug 8, 2026

Primary CVSS

7.0/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

0.3%

Low · next 30 days

Percentile: 22.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2023-37250-POCPoC
Proof-of-concept exploit for CVE-2023-37250, a local privilege escalation vulnerability in Windows, with a detailed write-up explaining the roaming and racing technique to gain SYSTEM privileges.

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