CVE-2026-5525
Stack-Based Buffer Overflow in Notepad++ File Drop Handler leads to DoS
- State
- Published
- Severity
- 6.0 Medium
- Published
- Apr 10, 2026
- Updated
- Apr 10, 2026
- Reserved
- Apr 4, 2026
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).
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.0 Medium | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N | securin |
Weaknesses
- CWE-121 Stack-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
Notepad++Notepad++ Project |
|
References
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