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CVE-2026-5525
MEDIUM6.0
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).
CVE Details
CVSS v3.1 Score6.0
SeverityMEDIUM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
Attack VectorLOCAL
ComplexityHIGH
Privileges RequiredLOW
User InteractionREQUIRED
Published4/10/2026
Last Modified4/13/2026
Sourcenvd
Honeypot Sightings0
Weaknesses (CWE)
CWE-121
References
https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bfe7514d68bc559534c046c4ef2d1865267aa2b0(33c584b5-0579-4c06-b2a0-8d8329fcab9c)
https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921(33c584b5-0579-4c06-b2a0-8d8329fcab9c)
https://github.com/notepad-plus-plus/notepad-plus-plus/pull/17930(33c584b5-0579-4c06-b2a0-8d8329fcab9c)
https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921(134c704f-9b21-4f2e-91b3-4a467353bcc0)
IOC Correlations
No correlations recorded
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