High 7.8Published Apr 10, 2026

CVE-2026-5525A stack-based buffer overflow vulnerability exists in Notepad++ version 8.9.3 in the file drop handler component.

Updated under an hour ago (2026-10-19 09:00 UTC)

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Every CVE for notepad-plus-plus notepad++

Exploited in the last 30 days

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).

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-121
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

notepad-plus-plus notepad++ notepad-plus-plus:notepad++	8.9.3	NVD

References

https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bfe7514d68bc559534c046c4ef2d1865267aa2b0patch
https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921exploit, issue-tracking, mitigation, vendor-advisory
https://github.com/notepad-plus-plus/notepad-plus-plus/pull/17930issue-tracking, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.