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 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 products
- Notepad++
- Notepad-plus-plus Notepad\+\+
- = 8.9.3
- Fix
- Available
- CVSS 3.1
- 7.8 HIGH
- EPSS
- 0.2% (6th percentile)
- Weakness
- CWE-121
- NVD status
- Analyzed
- Published
- 2026-04-10
CVE-2026-5525 at NVD
No indexed exploits for CVE-2026-5525 yet
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No exploit for CVE-2026-5525 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.