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Maono Link CVE-2026-77827

| EUVDEUVD-2026-74191 HIGH
Unquoted Search Path or Element (CWE-428)
2026-09-08 9119a7d8-5eab-497f-8521-727c672e3725 GHSA-gx86-6f2h-rhf6
8.4
CVSS 4.0 · Vendor: 9119a7d8-5eab-497f-8521-727c672e3725
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Severity by source

Vendor (9119a7d8-5eab-497f-8521-727c672e3725) PRIMARY
8.4 HIGH
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/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
vuln.today AI
8.4 HIGH

Local standard user writes to service directory (PR:L/AV:L/AC:L); scope changes to elevated service context (S:C) with full C:H/I:H; no availability impact described.

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

Primary rating from Vendor (9119a7d8-5eab-497f-8521-727c672e3725).

CVSS VectorVendor: 9119a7d8-5eab-497f-8521-727c672e3725

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

4
Metadata Corrected
Sep 08, 2026 - 22:40 vuln.today
tag: Microsoft removed
Analysis Generated
Sep 08, 2026 - 22:02 vuln.today
Patch available
Sep 08, 2026 - 21:35 EUVD
CVE Published
Sep 08, 2026 - 21:18 cve.org
HIGH 8.4

DescriptionCVE.org

Maono Link 3.8.13 MaonoAiServices Windows service allows local privilege escalation for a standard user account via improper write privileges in 'C:\ProgramData\Maono'. Fixed in 4.0.80.

AnalysisAI

Local privilege escalation in Maono Link 3.8.13 on Windows enables any standard user account to gain elevated service-level privileges by writing a malicious payload to C:\ProgramData\Maono. The MaonoAiServices Windows service runs with elevated OS privileges while leaving its data directory writable by unprivileged local users - a classic insecure service directory permission pattern (CWE-428). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Requires an existing local standard (non-admin) user account on a Windows system with Maono Link version prior to 4.0.80 installed and the MaonoAiServices service active. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 8.4 (AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N) accurately reflects a low-complexity local attack requiring only a standard user account and no user interaction, yielding high confidentiality and integrity impact. … 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 Upgrade Maono Link to version 4.0.80 or later; this is a vendor-released patch per CSAF advisory VA-26-251-01. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, identify all systems running Maono Link 3.8.13 and assess exposure to standard user accounts. …

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CVE-2026-77827 vulnerability details – vuln.today

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