CVE-2026-5525

MEDIUM SEVERITY

CVSS Score & Metrics

Base Score

6.0 / 10

Vector String

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

Vulnerability 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).

Vulnerability Details

Published Date

April 10, 2026

Last Modified

April 13, 2026

CWE ID

CWE-121

Source

NVD

External References

https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bfe7514d68bc559534c046c4ef2d1865267aa2b0
https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921
https://github.com/notepad-plus-plus/notepad-plus-plus/pull/17930

CVE-2026-5525

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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