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VULNERABILITIES

CVE-2026-5525 Details

Description

A stack-based buffer overflow vulnerability exists in Notepad++ version 8.9.3 in the file drop handler component. When a user drags and drops a directory path of exactly 259 characters without a trailing backslash, the application appends a backslash and null terminator without proper bounds checking, resulting in a stack buffer overflow and application crash (STATUS_STACK_BUFFER_OVERRUN).

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA: securinCVSS-B:6 MEDIUMVector:CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921 CISA-ADPExploitIssue TrackingMitigationVendor Advisory
https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bfe7514d68bc559534c046c4ef2d1865267aa2b0 securinPatch
https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921 securinExploitIssue TrackingMitigationVendor Advisory
https://github.com/notepad-plus-plus/notepad-plus-plus/pull/17930 securinIssue TrackingPatch

Weakness Enumeration

CWE-IDCWE NameSource
CWE-121Stack-based Buffer Overflowsecurin

Affected Products

ProductVersions
notepad-plus-plus notepad++
8.9.3

CPE

  • cpe:2.3:a:notepad-plus-plus:notepad++:8.9.3:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-5525
NVD Published Date:
Apr 10, 2026
NVD Last Modified:
Jun 17, 2026
Source:
securin
CVE-2026-5525 Details - Not Deferred