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.

Published: 2015-05-20 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]

NVD Status：Modified，CVE State: published

View at NVD, CVE.org, EUVD

Threat Intelligence & Risk Assessment for CVE-2015-4016

EPSS CVSS CWE Affected OS Tracker

Conclusion & alert: CVE-2015-4016 is rated Moderate Risk (47.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.17%). Mandatory action: Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2015-4016

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-03-17	0.64%	1.17%	+0.54%
2	2024-12-30	0.90%	0.64%	-0.27%
3	2024-12-17	—	0.90%	—

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-4016

CVSS metrics for this CVE.

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.0	2.0	MEDIUM	`AV:N/AC:L/Au:N/C:N/I:N/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:P) Partial availability impact.	10.0	2.9	[email protected]

Weakness enumeration for CVE-2015-4016

CWE-20 MITRE ↗

OS Trackers for CVE-2015-4016

vendor	priority	summary	link
`ubuntu`	low	CVE-2015-4016 low priority: Ubuntu including 1 source packages (steam), 12 status rows across 12 suites (artful, bionic, cosmic, precise, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): ignored 6, not-affected 4, DNE 2.	https://ubuntu.com/security/CVE-2015-4016

Affected software / configurations for CVE-2015-4016

Vendor	Product	Version	Raw CPE
valvesoftware	steam_client	< 2015-05-13	cpe:2.3:a:valvesoftware:steam_client::::::::

References for CVE-2015-4016

URL	Tags
http://store.steampowered.com/news/16801/	Patch Vendor Advisory
http://www.securityfocus.com/bid/74735	Third Party Advisory VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-15-233/	Third Party Advisory VDB Entry

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