CVE-2025-27998

HIGH
2025-05-21 [email protected]
8.4
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 28, 2026 - 18:43 vuln.today
CVE Published
May 21, 2025 - 16:15 nvd
HIGH 8.4

Tags

RCE Code Injection

Description

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

Analysis

An issue in Valvesoftware Steam Client Steam Client 1738026274 allows attackers to escalate privileges via a crafted executable or DLL. Rated high severity (CVSS 8.4), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

Technical Context

This vulnerability is classified as Code Injection (CWE-94), which allows attackers to inject and execute arbitrary code within the application. An issue in Valvesoftware Steam Client Steam Client 1738026274 allows attackers to escalate privileges via a crafted executable or DLL.

Affected Products

Valvesoftware Steam Client Steam Client 1738026274.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Never evaluate user-controlled input as code. Use sandboxing, disable dangerous functions, apply strict input validation.

Priority Score

42
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +42
POC: 0

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CVE-2025-27998 vulnerability details – vuln.today
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