CVE-2025-66265

Insecure permissions in configuration directory (C:\\usr)

Published Nov 26, 2025 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Description
CMService.exe creates the C:\\usr directory and subdirectories with insecure permissions, granting write access to all authenticated users. This allows attackers to replace configuration files (such as snmp.conf) or hijack DLLs to escalate privileges.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Megatec
Megatec upsilon2000
Microsoft
Microsoft windows
Vendors & Products Megatec
Megatec upsilon2000
Microsoft
Microsoft windows
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description CMService.exe creates the C:\\usr directory and subdirectories with insecure permissions, granting write access to all authenticated users. This allows attackers to replace configuration files (such as snmp.conf) or hijack DLLs to escalate privileges.
Title Insecure permissions in configuration directory (C:\\usr)
Weaknesses CWE-269
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:L/SI:L/SA:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Gridware
Published
Updated
Nov 26, 2025, 3:31 PM
Reserved
Nov 26, 2025, 1:02 AM
Status
Deferred
Published
Nov 26, 2025, 1:16 AM
Modified
Oct 18, 2026, 8:10 PM