CVE-2026-5525
Medium · 6.0CVSS
6.0
EPSS
0.2%
Published
Apr 10, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
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