CVE-2025-27998 Code injection in n/a
Attackers can escalate privileges and execute code in the Steam Client by using a crafted executable or DLL.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-27998?
CVE-2025-27998 is a high-severity code injection vulnerability in n/a, published on 21 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An issue in Valvesoftware Steam Client Steam Client 1738026274 allows attackers to escalate privileges via a crafted executable or DLL.
Weakness: CWE-94
Which versions are affected by CVE-2025-27998?
How do I fix CVE-2025-27998?
No fix has been published for CVE-2025-27998 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2025-27998 being exploited?
There is no known exploitation of CVE-2025-27998 in the wild and no public exploit code.
Sources
Also known as GHSA-cmvj-3pj4-hrr7.