SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2015-4016

The client detection protocol in Valve Steam allows remote attackers to cause a denial of service (process crash) via a crafted response to a broadcast packet.

MEDIUM 5.0EPSS 2.97%

Does this matter?

Lower severity and a low EPSS score (2.97%). Track it; it rarely justifies an emergency change on its own.

Description

The client detection protocol in Valve Steam allows remote attackers to cause a denial of service (process crash) via a crafted response to a broadcast packet.

CVSS 2.0
5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS
2.97% probability · 87th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-20
Affected
valvesoftware/steam client
Source
cve@mitre.org
EPSS trend
0%3%5%26 October 2026: 2.97%26 October 202626 October 2026

EPSS 3.0% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.