Critical 9.8Known exploited (CISA KEV)Published Jun 15, 2017

CVE-2017-8543Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista, Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8, Windows 8.1 and Windows RT 8.1, Windows Server 2012…

Updated under an hour ago (2026-10-19 07:50 UTC)

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It affects Microsoft Corporation Microsoft Windows and 10 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since May 24, 2022; federal agencies had to remediate by Jun 14, 2022. Treat that date as your deadline.

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Every CVE for Microsoft Corporation Microsoft Windows

Exploited in the last 30 days

Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista, Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allow an attacker to take control of the affected system when Windows Search fails to handle objects in memory, aka "Windows Search Remote Code Execution Vulnerability".

CVSS: 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-281
Known exploited: Added to CISA KEV May 24, 2022; federal remediation due Jun 14, 2022Apply updates per vendor instructions.
EPSS (exploitation in the next 30 days): 74.16% (percentile 99)
Assigned by: microsoft
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Microsoft Corporation Microsoft Windows microsoft:windows (from the name)	Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista, Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016.	CNA record
microsoft windows_10_1507 microsoft:windows_10_1507	all versions; all versions	NVD
microsoft windows_10_1511 microsoft:windows_10_1511	all versions; all versions	NVD
microsoft windows_10_1607 microsoft:windows_10_1607	all versions; all versions	NVD
microsoft windows_10_1703 microsoft:windows_10_1703	all versions; all versions	NVD
microsoft windows_7 microsoft:windows_7	all versions	NVD
microsoft windows_8.1 microsoft:windows_8.1	all versions	NVD
microsoft windows_rt_8.1 microsoft:windows_rt_8.1	all versions	NVD
microsoft windows_server_2008 microsoft:windows_server_2008	all versions; r2; r2	NVD
microsoft windows_server_2012 microsoft:windows_server_2012	all versions; r2	NVD
microsoft windows_server_2016 microsoft:windows_server_2016	all versions	NVD

References

http://www.securityfocus.com/bid/98824vdb-entry, x-refsource-bid, broken-link, third-party-advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8543x-refsource-confirm, mitigation, patch, vendor-advisory
http://www.securitytracker.com/id/1038667vdb-entry, x-refsource-sectrack, broken-link, third-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-8543us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.