EUVD-2026-71685
GHSA-v97v-xg2j-qq42
Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Local low-privilege access to a kernel driver enabling arbitrary physical memory writes changes scope to compromise the host OS kernel (S:C), justifying C:H/I:H/A:H.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
4DescriptionCVE.org
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.
AnalysisAI
Arbitrary physical memory write via a hard-coded cryptographic key in the shared Windows kernel driver DirectIo64.sys affects PassMark PerformanceTest (before 11.1 build 1012), BurnInTest (before 11.1 build 1000), and OSForensics (before 11.1 build 1016). An attacker with local low-privilege access can extract the 8-byte key embedded as a hardcoded literal in the distributed binary, compute valid MD5 authentication tags for arbitrary IOCTL write requests, and additionally use the driver's own bit-clear IOCTL to permanently disable all MAC verification, size checks, and Vendor ID checks - enabling unrestricted writes to arbitrary physical memory locations. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The three PassMark products (PerformanceTest, BurnInTest, or OSForensics) must be installed on the Windows host, which causes DirectIo64.sys to be present on the system. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.5 (AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H) accurately captures the severity: low-privilege local access plus trivial exploitation complexity is sufficient to achieve full physical memory control. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Update PassMark PerformanceTest to version 11.1 build 1012 or later, BurnInTest to version 11.1 build 1000 or later, and OSForensics to version 11.1 build 1016 or later; patched builds are available directly from Passmark Software via the changelogs at https://www.passmark.com/products/performancetest/history.php, https://www.passmark.com/products/burnintest/history.php, and https://www.osforensics.com/whats-new.html. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running PassMark PerformanceTest (versions before 11.1 build 1012), BurnInTest (before 11.1 build 1000), or OSForensics (before 11.1 build 1016) and restrict non-administrative local access until patched. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Windows Win32k fails to properly handle objects in memory, allowing local privilege escalation exploited in the wild in
A privilege escalation vulnerability (CVSS 5.5). Risk factors: actively exploited (KEV-listed), EPSS 94% exploitation pr
Windows Internet Shortcut Files (.url) contain an external control vulnerability (CVE-2025-33053, CVSS 8.8) that enables
Windows SMB contains an improper access control vulnerability (CVE-2025-33073, CVSS 8.8) enabling authenticated attacker
Twonky Server 8.5.2 on Linux and Windows allows unauthenticated access to the admin log file through a web service API b
An unrestricted file upload vulnerability exists in MiniWeb HTTP Server <= Build 300 that allows unauthenticated remote
FreeFloat FTP Server contains multiple critical design flaws that allow unauthenticated remote attackers to upload arbit
Serviio Media Server versions 1.4 through 1.8 on Windows contain an unauthenticated command injection in the /rest/actio
Twonky Server 8.5.2 uses hard-coded cryptographic keys for encrypting the administrator password. Combined with the cred
Mako Server versions 2.5 and 2.6 contain an unauthenticated OS command injection via the tutorial interface at examples/
React Native Metro Development Server binds to external interfaces by default and contains an OS command injection endpo
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network
Same weakness CWE-321 – Use of Hard-coded Cryptographic Key
View allShare
External POC / Exploit Code
Leaving vuln.today