CVE-2026-5525

HIGH EPSS 6.1%
Published Apr 10, 20262mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Apr 10, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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).

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
6.1% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-121

Affected Products 1

VendorProductVersionRange
notepad-plus-plusnotepad\+\+8.9.3any

References 3

  • github.com https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bfe7514d68bc559534c046c4ef2d1865267aa2b0
    Patch
  • github.com https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921
    ExploitIssue TrackingMitigationVendor Advisory
  • github.com https://github.com/notepad-plus-plus/notepad-plus-plus/pull/17930
    Issue TrackingPatch

Remediation

  • github.com https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bfe7514d68bc559534c046c4ef2d1865267aa2b0
    Patch
  • github.com https://github.com/notepad-plus-plus/notepad-plus-plus/pull/17930
    Issue TrackingPatch