VulnerabilityModified

CVE-2021-34476

Bowser.sys Denial of Service Vulnerability

HIGH 7.5EPSS 3.25%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (3.25%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Bowser.sys Denial of Service Vulnerability

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 3.25% probability · 88th percentile
CISA KEV: Not listed
Affected: microsoft/windows 10 · microsoft/windows 7 · microsoft/windows 8.1 · microsoft/windows server 2008 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019
Source: secure@microsoft.com

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34476
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34476Patch, Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.