206 matches found
CVE-2026-107615
An uncontrolled search path element vulnerability in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenticated user to execute arbitrary code with SYSTEM privileges. DynamicLibrary::init and ThemeLib load screenhooks32.dll / screenhooks64.dll with LoadLibrary using a bare fi...
CVE-2026-107614
An integer underflow in WinCursorShapeUtils::trimTransparent in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenticated user to crash the server, and potentially read out-of-bounds memory, by causing a cursor shape with a width or height of zero to be processed on the DXGI...
CVE-2026-107613
A NULL pointer dereference vulnerability in the Win8ScreenDriver component of GlavSoft TightVNC Server for Windows before 2.8.88 allows an attacker to crash the server, causing a denial of service. When re-initialization of the DXGI Desktop Duplication driver fails in applyNewScreenProperties for...
CVE-2026-107611
An out-of-bounds read vulnerability in the ZRLE decoder of GlavSoft TightVNC Viewer for Windows before 2.8.88 allows a malicious or compromised VNC server to read heap memory beyond the palette allocation and crash the viewer by sending ZRLE-encoded tiles whose palette indices exceed the declared...
CVE-2026-107612
Incorrect permission assignment in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenticated user to read or overwrite the inter-process communication handles used between the TightVNC service and its desktop server process. The named shared memory segment in the Global...
CVE-2024-42049-PoC
CVE-2024-42049-PoC CVE 詳細 https://nvd.nist.gov/vuln/detail/CVE-2024-42049 TightVNC（Windows 用サーバー）2.8.84 より前のバージョンでは、攻撃者がネットワーク接続を介して制御パイプに接続できる。 PoC 詳細 記事: https://izvd.eu/research/exploiting-cve-2024-42049 テスト済み: 2.7.10、2.8.81。'TightVNCServiceControl' または 'TightVNCApplicationControlOnSession'...
CVE-2026-107615
GlavSoft TightVNC Server for Windows versions prior to 2.8.88 is vulnerable to a DLL search order hijacking vulnerability. The DynamicLibrary::init() and ThemeLib components use LoadLibrary() to load screenhooks32.dll or screenhooks64.dll using a bare file name without specifying LOAD_LIBRARY_SEA...
EUVD-2026-94979
An uncontrolled search path element vulnerability in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenticated user to execute arbitrary code with SYSTEM privileges. DynamicLibrary::init and ThemeLib load screenhooks32.dll / screenhooks64.dll with LoadLibrary using a bare fi...
EUVD-2026-94978
An integer underflow in WinCursorShapeUtils::trimTransparent in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenticated user to crash the server, and potentially read out-of-bounds memory, by causing a cursor shape with a width or height of zero to be processed on the DXGI...
CVE-2026-107614
GlavSoft TightVNC Server for Windows versions before 2.8.88 are vulnerable to an integer underflow in the WinCursorShapeUtils::trimTransparent() function. When a cursor shape with a width or height of zero is processed on the DXGI capture path , the loop bound width - 1 wraps to 0xFFFFFFFF. This ...
EUVD-2026-94977
A NULL pointer dereference vulnerability in the Win8ScreenDriver component of GlavSoft TightVNC Server for Windows before 2.8.88 allows an attacker to crash the server, causing a denial of service. When re-initialization of the DXGI Desktop Duplication driver fails in applyNewScreenProperties for...
CVE-2026-107613
GlavSoft TightVNC Server for Windows versions before 2.8.88 contains a NULL pointer dereference vulnerability in the Win8ScreenDriver component. The issue occurs when the DXGI Desktop Duplication driver fails to re-initialize during the applyNewScreenProperties() function (e.g., following a GPU r...
EUVD-2026-94976
Incorrect permission assignment in GlavSoft TightVNC Server for Windows before 2.8.88 allows a local authenticated user to read or overwrite the inter-process communication handles used between the TightVNC service and its desktop server process. The named shared memory segment in the Global...
CVE-2026-107612
GlavSoft TightVNC Server for Windows versions prior to 2.8.88 contains an incorrect permission assignment in its inter-process communication (IPC) mechanism. The software creates a shared memory segment in the *Global* namespace with a NULL DACL , allowing local authenticated users to read or ove...
EUVD-2026-94975
An out-of-bounds read vulnerability in the ZRLE decoder of GlavSoft TightVNC Viewer for Windows before 2.8.88 allows a malicious or compromised VNC server to read heap memory beyond the palette allocation and crash the viewer by sending ZRLE-encoded tiles whose palette indices exceed the declared...
CVE-2026-107611
GlavSoft TightVNC Viewer for Windows before version 2.8.88 is vulnerable to an out-of-bounds read in its ZRLE decoder . The issue occurs because the readPaletteRleTile() and readPackedPaletteTile() functions fail to validate attacker-supplied indices against the declared palette size. A malicious...
CVE-2022-23967
CVE-2022-23967 TightVNC 1.3.10 では、整数の符号誤りがあり、その結果 rfbproto.c の InitialiseRFBConnection にヒープベースのバッファオーバーフローが発生します vncviewer コンポーネント用。malloc に与えられるサイズのチェックがなく、 例えば -1 が受け入れられます。これによりサイズ 0 のチャンクが割り当てられ、 ヒープポインタが得られます。しかし、0xffffffff バイトのデータが送信される可能性があり、 DoS の影響またはリモートコード実行につながる可能性があります。 脆弱性タイプ...
Web Shells, Tunnels, and Ransomware: Dissecting a Warlock Attack
Warlock continues to enhance its attack chain with new tactics to improve persistence, lateral movement, and defense evasion using an expanded toolset: TightVNC Yuze, and a persistent BYOVD technique leveraging the NSec driver...