PT-2026-58887 · Notepad++ · Notepad++
CVE-2026-54758
·
Published
2026-07-15
·
Updated
2026-09-12
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Notepad++ versions prior to 8.9.7
Description
The
expandNppEnvironmentStrs() function in PowerEditor/src/WinControls/StaticDialog/RunDlg/RunDlg.cpp copies a variable name located between $( and ) into a fixed-size wchar t str[MAX PATH] stack buffer. Because the m loop index is not bounded, a variable name containing 260 or more characters can corrupt adjacent stack data. This can lead to process termination via report gsfailure or potential arbitrary code execution.Recommendations
Update to version 8.9.7.
Exploit
Fix
RCE
Memory Corruption
Stack Overflow
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Related Identifiers
Affected Products
Notepad++