Which products and versions are affected by CVE-2017-11771?

Affected: Windows 10 (Microsoft) versions 1511, 1607, 1703; Windows 7 (Microsoft); Windows 8.1 (Microsoft), among others. The full list is in the CVE brief.

Is CVE-2017-11771 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2017-11771 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2017-11771?

No public exploit code is known.

Is there a fix for CVE-2017-11771?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2017-11771 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2017-11771

Critical

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…

Published Oct 13, 2017 · Updated May 12, 2026

Key Facts

Patch immediately

CVE-2017-11771 is a critical-severity vulnerability (CVSS 9.8 v3) affecting Windows 10 (Microsoft), Windows 7 (Microsoft), Windows 8.1 (Microsoft) and 5 more products.
It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
EPSS estimates a 52% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v3

9.8

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

52%

Higher than 98.9% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

None known

Get the full CVE-2017-11771 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Affected Products

13 affected entries in total

Product	Affected versions	Fixed in
Windows 10Microsoft	1511, 1607, 1703	n/a
Windows 7Microsoft	See advisory	n/a
Windows 8.1Microsoft	See advisory	n/a
Windows Rt 8.1Microsoft	See advisory	n/a
Windows Server 2008Microsoft	r2-sp1	n/a

3 more affected products in the full CVE brief

Timeline

Publicly disclosed
Oct 13, 2017
Last updated
May 12, 2026

Weakness Type

CWE-20 Improper Input Validation

References

advisory101114
advisory1039538
patchhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11771

FAQ

Common Questions.

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…
Affected: Windows 10 (Microsoft) versions 1511, 1607, 1703; Windows 7 (Microsoft); Windows 8.1 (Microsoft), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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