CVE-2026-5525: Stack-Based Buffer Overflow in Notepad++ File Drop Handler leads to DoS
Notepad++ Project · Notepad++
Vendor fix available · Affected: Notepad++ Project · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 6% of scored CVEs
DescriptionCVE.org
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 products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Notepad++ Project · Notepad++8.9.3
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Notepad++ Project
- Published
- April 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-5525 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.