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CVE-2026-5525

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CVE-2026-5525

Published: Apr 10, 2026

Modified: Apr 10, 2026

PUBLISHED

CVSS v3.1

6.0

MEDIUM

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).

VendorProductVersions

Notepad++ Project

Notepad++

affected
8.9.3
unaffected
8.9.4

Weaknesses (CWE)

CWE-121

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

References

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