How severe is CVE-2015-4016?

CVE-2015-4016 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2015-4016 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-4016?

CVE-2015-4016 affects Valvesoftware Steam Client. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-4016?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-4016 published?

CVE-2015-4016 was published on 2015-05-20 and last updated on 2026-06-17.

CVE-2015-4016

CVE-2015-4016 is a medium-severity vulnerability in Valvesoftware Steam Client with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Valvesoftware Steam Client
Published: 2015-05-20
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2015-4016?: CVE-2015-4016 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2015-4016 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-4016?: CVE-2015-4016 affects Valvesoftware Steam Client. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-4016?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-4016 published?: CVE-2015-4016 was published on 2015-05-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:valvesoftware:steam_client:*:*:*:*:*:*:*:*

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