VulnerabilityModified

CVE-2017-11771

CRITICAL 9.8EPSS 51.9%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 51.9%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.

Description

The Microsoft Windows Search component on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows a remote code execution vulnerability when it fails to properly handle DNS responses, aka "Windows Search Remote Code Execution Vulnerability".

CVSS 3.0: 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 51.93% probability · 99th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-20
Affected: microsoft/windows 10 · microsoft/windows 7 · microsoft/windows 8.1 · microsoft/windows rt 8.1 · microsoft/windows server 2008 · microsoft/windows server 2012 · microsoft/windows server 2016
Source: secure@microsoft.com

EPSS trend

EPSS moved from 55.2% on 21 September 2026 to 51.9% on 27 October 2026, peaking at 64.1% on 22 September 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.

References

http://www.securityfocus.com/bid/101114Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039538Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11771Patch, Vendor Advisory
http://www.securityfocus.com/bid/101114Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039538Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11771Patch, Vendor Advisory

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