CVE-2026-5525
Stack-Based Buffer Overflow in Notepad++ File Drop Handler leads to DoS
CVSS Score
6.0
EPSS Score
0.0%
EPSS Percentile
0th
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).
| CWE | CWE-121 |
| Vendor | notepad++ project |
| Product | notepad++ |
| Published | Apr 10, 2026 |
| Last Updated | Apr 10, 2026 |
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CVSS v3 Breakdown
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
Affected Versions
Notepad++ Project / Notepad++
8.9.3