CVE-2026-5525

Published: Apr 10, 2026Modified: Jun 17, 2026

7.8

Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitability: 1.8 / Impact: 5.9

Source: NVD

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).

Affected (1)

Products: Notepad Plus Plus: Notepad++

Notepad Plus Plus

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Notepad Plus Plus Notepad++	Version 8.9.3

Related CWEs

Stack-based Buffer Overflow

A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

References (4)

https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bfe7514d68bc559534c046c4ef2d1865267aa2b0

Source: 33c584b5-0579-4c06-b2a0-8d8329fcab9c

Patch

https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921

Source: 33c584b5-0579-4c06-b2a0-8d8329fcab9c

ExploitIssue TrackingMitigationVendor Advisory

https://github.com/notepad-plus-plus/notepad-plus-plus/pull/17930

Source: 33c584b5-0579-4c06-b2a0-8d8329fcab9c

Issue TrackingPatch

https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

ExploitIssue TrackingMitigationVendor Advisory

Timeline

No history available yet.