CVE-2025-27998

An issue in Valvesoftware Steam Client Steam Client 1738026274 allows attackers to escalate privileges via a crafted executable or DLL...

CVE-2020-6016

Valve's Game Networking Sockets prior to version v1.2.0 improperly handles unreliable segments with negative offsets in function SNPReceiveUnreliableSegment, leading to a Heap-Based Buffer Underflow and a free of memory not from the heap, resulting in a memory corruption and probably even a remot...

CVE-2020-6019

Valve's Game Networking Sockets prior to version v1.2.0 improperly handles inlined statistics messages in function CConnectionTransportUDPBase::ReceivedData, leading to an exception thrown from libprotobuf and resulting in a crash...

CVE-2020-6017

Valve's Game Networking Sockets prior to version v1.2.0 improperly handles long unreliable segments in function SNPReceiveUnreliableSegment when configured to support plain-text messages, leading to a Heap-Based Buffer Overflow and resulting in a memory corruption and possibly even a remote code...

CVE-2020-12242

Valve Source allows local users to gain privileges by writing to the /tmp/hl2relaunch file, which is later executed in the context of a different user account...

CVE-2020-15530

An issue was discovered in Valve Steam Client 2.10.91.91. The installer allows local users to gain NT AUTHORITY\SYSTEM privileges because some parts of %PROGRAMFILESX86%\Steam and/or %COMMONPROGRAMFILESX86%\Steam have weak permissions during a critical time window. An attacker can make this time...

CVE-2020-7952

rendersystemdx9.dll in Valve Dota 2 before 7.23f allows remote attackers to achieve code execution or denial of service by creating a gaming server and inviting a victim to this server, because a crafted map is affected by memory corruption...

CVE-2019-15316

Valve Steam Client for Windows through 2019-08-20 has weak folder permissions, leading to privilege escalation to NT AUTHORITY\SYSTEM via crafted use of CreateMountPoint.exe and SetOpLock.exe to leverage a TOCTOU race condition...

CVE-2019-17180

Valve Steam Client before 2019-09-12 allows placing or appending partially controlled filesystem content, as demonstrated by file modifications on Windows in the context of NT AUTHORITY\SYSTEM. This could lead to denial of service, elevation of privilege, or unspecified other impact...

CVE-2019-15315

Valve Steam Client for Windows through 2019-08-16 allows privilege escalation to NT AUTHORITY\SYSTEM because local users can replace the current versions of SteamService.exe and SteamService.dll with older versions that lack the CVE-2019-14743 patch...

CVE-2019-14743

In Valve Steam Client for Windows through 2019-08-07, HKLM\SOFTWARE\Wow6432Node\Valve\Steam has explicit "Full control" for the Users group, which allows local users to gain NT AUTHORITY\SYSTEM access...

CVE-2017-17878

An issue was discovered in Valve Steam Link build 643. Root passwords longer than 8 characters are truncated because of the default use of DES aka the CONFIGFEATUREDEFAULTPASSWDALGO="des" setting...

CVE-2013-7128

Valve Bug Reporter in the valve-bugreporter package 2.10+bsos1 in Valve SteamOS Beta stores cleartext credentials in a .valve-bugreporter.cfg file upon a Remember Credentials action, which allows local users to obtain sensitive information by reading this file...

CVE-2003-1325

The SVCheckForDuplicateNames function in Valve Software Half-Life CSTRIKE Dedicated Server 1.1.1.0 and earlier allows remote authenticated users to cause a denial of service infinite loop and daemon hang via a certain connection string to UDP port 27015 that represents "absence of player...

CVE-2025-27998

An issue in Valvesoftware Steam Client Steam Client 1738026274 allows attackers to escalate privileges via a crafted executable or DLL...

Valve Steam Client 安全漏洞

Valve Steam Client is a digital game distribution client from Valve Corporation, USA. A security vulnerability exists in Valve Steam Client version 1738026274, which originates from a specially crafted executable or DLL, and may result in elevated privileges...

CVE-2025-27998

An issue in Valvesoftware Steam Client Steam Client 1738026274 allows attackers to escalate privileges via a crafted executable or DLL...

PT-2025-22384

Name of the Vulnerable Software and Affected Versions Valvesoftware Steam Client version 1738026274 Description The issue allows attackers to escalate privileges via a crafted executable or DLL. This can be achieved by manipulating a specifically crafted executable or DLL, which enables the...

CVE-2025-27998

An issue in Valvesoftware Steam Client Steam Client 1738026274 allows attackers to escalate privileges via a crafted executable or DLL...

CVE-2025-27998

CVE-2025-27998 affects Valve’s Steam Client (version 1738026274). The issue allows local privilege escalation via a crafted executable or DLL, with a CVSSv3.1 base score of 8.4 (HIGH) and impact on confidentiality, integrity, and availability. Affected component: Steam Client; root cause and exac...