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CVE-2026-5525

Stack-Based Buffer Overflow in Notepad++ File Drop Handler leads to DoS PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
Notepad++ Project / Notepad++affected 8.9.3; unaffected 8.9.4

CWE

CWE-121

References

ADP enrichment

CISA-ADP

No English description supplied.