CVE-2026-5525: 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…

PriorityP338high7.8CVSS 3.1

AVLACLPRNUIRSUCHIHAH

EPSS

0.17%

6.1th percentile

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

2 ranges

Vendor	Product	Version range	Fixed in
notepad++_project	notepad	—	—
notepad-plus-plus	notepad	—	—

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