PoC Index

CVE-2021-30481

CRITICAL 9.0EPSS 3.5%

Valve Steam through 2021-04-10, when a Source engine game is installed, allows remote authenticated users to execute arbitrary code because of a buffer overflow that occurs for a Steam invite after one click.

CVSS v3.1
9.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
CVSS v3.1
8.0 HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
CVSS v2.0
6.0 MEDIUMAV:N/AC:M/Au:S/C:P/I:P/A:P
EPSS
3.50% chance of exploitation in the next 30 days, 88th percentile
Published
2021-04-10
Updated
2025-11-03

Proof-of-concept exploits (2)

Exploit collections (1)

References

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