What’s Vulnerable › Vulnerabilities

CVE-2026-80114: PassMark PerformanceTest, BurnInTest, and OSForensics Hard-coded Credentials Authentication Bypass via DirectIo64.sys

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-04 · updated 2026-09-08
• Weakness: CWE-321

Description

PassMark PerformanceTest before 11.1 build 1012, BurnInTest before 11.1 build 1000, and OSForensics before 11.1 build 1016 contain a hard-coded credentials vulnerability in DirectIo64.sys that allows local attackers to perform arbitrary physical memory writes by extracting an 8-byte key embedded as a hardcoded literal in the distributed binary and computing valid MD5 authentication tags for arbitrary IOCTL write requests. Attackers can additionally bypass a secondary validation gate by using the driver's own bit-clear IOCTL to clear a single bit in the gating instruction's displacement byte, causing all subsequent write requests to skip MAC verification, size checks, and Vendor ID checks entirely.

Affected products

• PassMark Software BurnInTest: before 11.1 build 1000 — fixed in 11.1 build 1000
• PassMark Software OSForensics: before 11.1 build 1016 — fixed in 11.1 build 1016
• PassMark Software PerformanceTest: before 11.1 build 1012 — fixed in 11.1 build 1012

How to fix

Upgrade to a fixed version: PassMark Software BurnInTest 11.1 build 1000; PassMark Software OSForensics 11.1 build 1016; PassMark Software PerformanceTest 11.1 build 1012. Check the vendor advisory for mitigations.

References

• https://dkom.dev/posts/directio64-disclosure/
• https://github.com/floppywiggler/directio64-disclosure
• https://www.osforensics.com/whats-new.html
• https://www.passmark.com/products/burnintest/history.php
• https://www.passmark.com/products/performancetest/history.php
• https://www.vulncheck.com/advisories/passmark-performancetest-burnintest-and-osforensics-hard-coded-credentials-authentication-bypass-via-directio64-sys

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