notepad_CVE_2026_20841

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CVE-2026-20841_notepad_analysis

Цель Провести исследование уязвимости RCE в Microsoft notepad CVE-2026-20841, бинарный анализ и создание PoC-эксплойта в учебных целях. Распределение ролей Запустить Agent Team с предполагаемым мной распределением ролей и выполнить работу. Охотник за бинарниками: собирает бинарники до и после...

CVE-2026-20841

CVE-2026-20841 Этот контент соответствует части того, что предоставляется через Ежемесячный отчёт для подписчиков PatchPoint. Обзор Microsoft раскрыла исправление для уязвимости RCE в Блокноте в феврале 2026 года. Уязвимость представляет собой уязвимость внедрения команд, которая возникает в...

CVE-2026-3008

CVE-2026-3008 — Notepad++ 8.9.3 Format String Injection via nativeLang.xml Vulnerability When a search operation produces results, sub1400916C0 formats a hit count label by retrieving a localized string from nativeLang.xml and passing it directly as the format string to wsprintfW: sub140099E60v37...

CVE-2026-20841-PoC

CVE-2026-20841-PoC Proof of Concept for CVE-2026-20841 CVE-2026-20841 – Details CVE-2026-20841 is a vulnerability affecting Microsoft Notepad, where specially crafted input can trigger unintended command execution. The issue occurs due to improper handling of certain file content or execution...

CVE-2025-49144-PoC

CVE-2025-49144 I write a blog about this vulnerability here: https://havertz2110.github.io/posts/cve-reproduce-cve-2025-49144-notepad++/...

CVE-2026-20841-PoC

CVE-2026-20841 - Windows Notepad App Remote Code Execution Vulnerability Vulnerability Overview Field| Detail ---|--- CVE ID| CVE-2026-20841 Title| Windows Notepad App Remote Code Execution Vulnerability Impact| Remote Code Execution Max Severity| Important CVSS v3.1 Base / Temporal| 8.8 / 7.7 CV...

CVE-2026-20841

CVE-2026-20841 - Windows Notepad RCE PoC for a remote code execution flaw in Windows Notepad's markdown renderer. The markdown engine does not restrict URL protocols, allowing arbitrary protocol handlers to be triggered via clickable links. Disclaimers 1. Not my discovery. Credit goes to the...

CVE-2026-20841

CVE-2026-20841 - Windows Notepad RCE PoC for a remote code execution flaw in Windows Notepad's markdown renderer. The markdown engine does not restrict URL protocols, allowing arbitrary protocol handlers to be triggered via clickable links. Disclaimers 1. Not my discovery. Credit goes to the...

CVE-2026-20841

The accuracy of this PoC trigger method has not been verified, and it should be considered informational/reference only. CVE-2026-20841 - Windows notepad.exe RCE Exploitation condition: Test on : Notepad Version 11.2510.14.0 step 1 : Save File step 2 : Open file Note: It does prompt to open progr...

PoC-CVE-2026-20841

PoC CVE-2026-20841 Description This project is a simple Proof of Concept PoC regarding Windows Notepad vulnerability about "remote code execution". Attackers have the ability to build a special .md file and by tricking users with Social Engineering skills into clicking the link within the .md fil...

CVE-2026-20841

CVE-2026-20841 PoC PoC of the "Windows Notepad RCE" vulnerability. Disclaimers 1. I am NOT the one who discovered this vulnerability. Props to the original authors listed on the official disclosure page. I just recreated the PoC according to the description. 2. I personally don't think this...

CVE-2023-40031

CVE-2023-40031 Analysis and Reproduction of notepad++ Heap Buffer Overflow Vulnerability CVE-2023-40031 Vulnerability Overview Notepad++ is a well-known open-source code editor that runs on Windows and supports multiple programming languages. Recently, security researchers examined Notepad++ and...

CVE-2026-52885

TOCTOU: HMAC Checks Disk, Executes from Memory Notepad++ v8.9.6.2 — Attacker-Controlled UserCommand Execution via HMAC Race Condition Advisory | ---|--- GHSA| GHSA-qm4c-qg8p-qfcr CVE| CVE-2026-52885 Severity| High Affected| v8.9.6.2 Patched| v8.9.6.4 Patch Commit| 4f7563c Affected File|...

CVE-2026-86056

Notepad++ is a free and open-source source code editor. Prior to 8.9.8, the NPPMSAVESESSION handler in PowerEditor/src/NppBigSwitch.cpp converts lParam to a sessionInfo pointer and dereferences its nbFile, files, and sessionFilePathName members without checking for null. A process running at the...

CVE-2026-85995

Notepad++ is a free and open-source source code editor. From 8.9.7 until 8.9.8, the Notepad++ updater and signature verification path can accept a modified GUP.exe file whose embedded certificate metadata remains present even though its Authenticode digest is invalid. An attacker who can replace ...

CVE-2026-85279

Notepad++ is a free and open-source source code editor. Prior to 8.9.8, Notepad++ contains a stack buffer overflow in PluginsManager::loadPluginFromPath in PowerEditor/src/MISC/PluginsManager/PluginsManager.cpp because the plugin-supplied GetLexerCount result controls a loop that writes to...

CVE-2026-85288

Notepad++ is a free and open-source source code editor. Prior to 8.9.8, Notepad++ incompletely enforces shortcuts.xml HMAC validation because WMMACRODLGRUNMACRO, the Run a Macro Multiple Times entry point, calls macroPlayback without the validation used by command. A tampered shortcuts.xml macro...

CVE-2026-86054

Notepad++ is a free and open-source source code editor. Prior to 8.9.8, Notepad++ contains a stack buffer overflow in NppParameters::writeSession in PowerEditor/src/Parameters.cpp because it copies a session path derived from -settingsDir= into backupPathNameMAXPATH with unbounded wcscpy and...

CVE-2026-77605

Notepad++ is a free and open-source source code editor. Prior to 8.9.8, the Folder as Workspace Run by system action in Notepad++ can resolve a different sibling file than the file selected by the user. When an attacker places a command script whose name is the selected text-file path with .cmd...