CVE-2026-80117Public exploit

System reset via unrestricted I/O port writes

Published Sep 4, 2026 · Updated Sep 4, 2026

Improper I/O access control in PassMark products allows local users to reset or manipulate Windows systems through DirectIo64.sys. DirectIo64.sys exposes IOCTLs 0x8011E050 and 0x8011E04C that pass caller-selected 16-bit port addresses to IN and OUT operations without an allowlist or port validation. A standard user must obtain a device handle in an affected build; writes to reset-controller ports immediately reboot the host, while access to CMOS and interrupt-controller ports enables hardware-level changes.

CVSS severity7.1
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper I/O access control in PassMark products allows local users to reset or manipulate Windows systems through DirectIo64.sys. DirectIo64.sys exposes IOCTLs 0x8011E050 and 0x8011E04C that pass caller-selected 16-bit port addresses to IN and OUT operations without an allowlist or port validation. A standard user must obtain a device handle in an affected build; writes to reset-controller ports immediately reboot the host, while access to CMOS and interrupt-controller ports enables hardware-level changes.

The record

CVE
CVE-2026-80117
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
PassMark Software
Product
BurnInTest
Classifications
CWE-782, T1529
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <11.1 build 1000

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

PassMark Software · BurnInTestversion=0 <11.1 build 1000
PassMark Software · OSForensicsversion=0 <11.1 build 1016
PassMark Software · PerformanceTestversion=0 <11.1 build 1012

Published CVSS scores

6.9VulnCheck CNACVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
7.1VulnCheck CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-782Exposed IOCTL with Insufficient Access Control
T1529System Shutdown/Reboot

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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