CVE-2026-58583Public exploit

SYSTEM privilege escalation via unchecked physical-memory IOCTL

Published Jul 7, 2026 · Updated Jul 7, 2026

Privilege escalation in FluxInk Color Management Driver before 1.0.7.6 allows local users to gain SYSTEM access through a crafted IOCTL. The TcnPeripheral64.sys handler for IOCTL 0x4002848 passes a user-controlled physical address and size to MmMapIoSpace without range or caller checks. A standard Windows account with local code execution can read and overwrite kernel memory, including replacing its process token with the SYSTEM token.

CVSS severity8.4
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in FluxInk Color Management Driver before 1.0.7.6 allows local users to gain SYSTEM access through a crafted IOCTL. The TcnPeripheral64.sys handler for IOCTL 0x4002848 passes a user-controlled physical address and size to MmMapIoSpace without range or caller checks. A standard Windows account with local code execution can read and overwrite kernel memory, including replacing its process token with the SYSTEM token.

The record

CVE
CVE-2026-58583
Published
Jul 7, 2026
Updated
Jul 7, 2026
Vendor
FluxInk
Product
Color Management Driver
Classifications
CWE-269, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 7, 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 <1.0.7.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

FluxInk · Color Management Driverversion=0 <1.0.7.6

Published CVSS scores

8.4CISACVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
7.8GitHub Security AdvisoryCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.1CISACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

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.

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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-269Improper Privilege Management
T1068Exploitation for Privilege Escalation

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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