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Notepad++ EUVDEUVD-2026-60373

| CVE-2026-71858 MEDIUM
OS Command Injection (CWE-78)
2026-08-17 security-advisories@github.com
5.4
CVSS 4.0 · Vendor: github
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Severity by source

Vendor (github) PRIMARY
5.4 MEDIUM
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/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
vuln.today AI
7.5 HIGH

Local vector with high complexity due to settingsDir control prerequisite; scope change applies because the attack targets an elevated process beyond the attacker's initial integrity level.

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

Primary rating from Vendor (github).

CVSS VectorVendor: github

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
P
Scope
X

Lifecycle Timeline

4
Patch available
Aug 17, 2026 - 21:17 EUVD
Source Code Evidence Fetched
Aug 17, 2026 - 20:38 vuln.today
Analysis Generated
Aug 17, 2026 - 20:38 vuln.today
CVE Published
Aug 17, 2026 - 20:16 cve.org
MEDIUM 5.4

DescriptionCVE.org

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, macros loaded from an attacker-controlled shortcuts.xml bypass the HMAC validation applied to UserDefinedCommands and can invoke Scintilla actions and the internal Open in Default Viewer command in an elevated Notepad++ process, allowing protected file modification and conditional elevated command execution when a local attacker influences settingsDir and a user triggers the macro. This issue is fixed in version 8.9.7.

AnalysisAI

Macro command injection in Notepad++ prior to 8.9.7 enables local privilege escalation by bypassing HMAC integrity validation on shortcuts.xml-sourced macros. An attacker who can place a malicious shortcuts.xml in the application's settingsDir can embed macro payloads that invoke Scintilla actions and the internal 'Open in Default Viewer' command within an elevated Notepad++ process, resulting in protected file modification or elevated command execution when a user triggers the macro. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Three conditions must align simultaneously: (1) the attacker must have local write access to the Notepad++ settingsDir or the ability to redirect path resolution so an elevated process loads shortcuts.xml from an attacker-controlled location; (2) Notepad++ must be running or launchable with elevated privileges (e.g., via 'Run as Administrator' or by an administrator-level user); and (3) a user within that elevated session must manually trigger a macro. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 5.4 with vector AV:L/AC:H/AT:P/PR:L/UI:P accurately characterises a constrained local privilege escalation with multiple hard prerequisites. … 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 to Notepad++ version 8.9.7 or later, available at https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.7; this is the only confirmed fix per the GitHub advisory GHSA-f4rj-vqq4-wvg4. … Detailed patch versions, workarounds, and compensating controls in full report.

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EUVD-2026-60373 vulnerability details – vuln.today

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