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CVE-2026-42214

Dail8859 Notepad Next code injection

7.8 HIGHPublic exploitEPSS 0.28%
  1. Published7 May 2026

Description

Notepad Next is a cross-platform, reimplementation of Notepad++. Prior to version 0.14, NotepadNext's detectLanguageFromExtension() function interpolates a file's extension directly into a Lua script without sanitization. An attacker can craft a filename whose extension contains Lua code, which executes automatically when the victim opens the file in NotepadNext. Because luaL_openlibs() is called unconditionally, the full os, io, and package libraries are available to the injected code, enabling arbitrary command execution. This issue has been patched in version 0.14.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Dail8859 Notepad Next< 0.14

Remediation

Fixed in
Dail8859 Notepad Next≥ 0.14

References

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Frequently asked

Is CVE-2026-42214 being actively exploited?

CVE-2026-42214 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.28%.

How severe is CVE-2026-42214?

CVE-2026-42214 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 0.28% probability of exploitation.

Which products are affected by CVE-2026-42214?

Affected products include Dail8859 Notepad Next.

How do I fix CVE-2026-42214?

Upgrade affected software to a fixed version, for example Dail8859 Notepad Next 0.14 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-42214 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.