CVE-2026-54758— Notepad++: Stack Buffer Overflow in expandNppEnvironmentStrs
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-54758
Vulnerability Information
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Vulnerability Title
Notepad++: Stack Buffer Overflow in expandNppEnvironmentStrs
Source: CVE Program / CVE List V5
Vulnerability Description
Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the expandNppEnvironmentStrs function in PowerEditor/src/WinControls/StaticDialog/RunDlg/RunDlg.cpp copies a Notepad++ variable name between $( and ) into the fixed-size wchar_t str[MAX_PATH] stack buffer without bounding the m loop index, allowing a name of 260 or more characters to corrupt adjacent stack data, terminate the process through __report_gsfailure, and potentially execute code. This issue is fixed in version 8.9.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| notepad-plus-plus | notepad-plus-plus | < 8.9.7 | - |
II. Public POCs for CVE-2026-54758
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 8200 chars
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III. Intelligence Information for CVE-2026-54758
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Patches & Fixes for CVE-2026-54758 (1)
Vendor Advisories for CVE-2026-54758 (1)
Vendor Pages for CVE-2026-54758 (1)
Same Patch Batch · notepad-plus-plus · 2026-08-17 · 4 CVEs total
| CVE-2026-57233 | 8.1 HIGH | Notepad++: Path Traversal (Zip Slip) in WinGup Plugin Extraction |
| CVE-2026-71858 | 5.4 MEDIUM | Notepad++: shortcuts.xml Macro HMAC Bypass Enables Conditional Elevated Command Execution |
| CVE-2026-52886 | 5.1 MEDIUM | Notepad++: session.xml backupFilePath starts_with Bypass |
IV. Related Vulnerabilities
Same product: notepad-plus-plus
- CVE-2026-57233
Notepad++: Path Traversal (Zip Slip) in WinGup Plugin Extrac - CVE-2026-52886
Notepad++: session.xml backupFilePath starts_with Bypass - CVE-2026-71858
Notepad++: shortcuts.xml Macro HMAC Bypass Enables Condition - CVE-2026-73250
Notepad++: Install-time PowerShell command injection through - CVE-2026-48770
Notepad++ WM_COPYDATA COPYDATA_FULL_CMDLINE local DoS crash
Same vendor: notepad-plus-plus
- CVE-2026-57233
Notepad++: Path Traversal (Zip Slip) in WinGup Plugin Extrac - CVE-2026-52886
Notepad++: session.xml backupFilePath starts_with Bypass - CVE-2026-71858
Notepad++: shortcuts.xml Macro HMAC Bypass Enables Condition - CVE-2026-73250
Notepad++: Install-time PowerShell command injection through - CVE-2026-48770
Notepad++ WM_COPYDATA COPYDATA_FULL_CMDLINE local DoS crash
Same weakness: CWE-121
- CVE-2026-73522
COVESA Open1722 0.9.2 Stack Buffer Overflow via avtp_to_can( - CVE-2026-71979
INDI indiserver 2.2.4.2 Stack Buffer Overflow via XML Tag Pa - CVE-2026-74843
Wavlink WN531P3/WN535M1 Export Pingortrace CGI export_pingor - CVE-2026-19959
Edimax EW-7478APC formWanTcpipSetup stack-based overflow - CVE-2026-19933
DefaultFuction Customer-Relationship-Management-In-C-Project
V. Comments for CVE-2026-54758
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