CVE-2026-5525 (GCVE-0-2026-5525)

Vulnerability from cvelistv5 – Published: 2026-04-10 07:40 – Updated: 2026-04-10 12:49
VLAI?
Title
Stack-Based Buffer Overflow in Notepad++ File Drop Handler leads to DoS
Summary
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).
Severity ?
6 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
CWE
  • CWE-121 - Stack-based Buffer Overflow
Assigner
References
Impacted products
Vendor Product Version
Notepad++ Project Notepad++ Affected: 8.9.3
Unaffected: 8.9.4
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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