How severe is CVE-2017-8543?

CVE-2017-8543 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2017-8543?

Affected package information for CVE-2017-8543 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2017-8543?

No fixed version has been published for CVE-2017-8543 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2017-8543 actively exploited in the wild?

Yes. There are 5 known exploit references for CVE-2017-8543, including 4 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2017-8543?

CVE-2017-8543 has an EPSS (Exploit Prediction Scoring System) score of 85.1%, placing it in the 99th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2017-8543 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2017-8543 (Microsoft Windows Search Remote Code Execution Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2022-05-24. CISA required all US federal civilian agencies to remediate this vulnerability by 2022-06-14. The required action was: Apply updates per vendor instructions. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2017-8543?

CVE-2017-8543 is classified as CWE-281 (CWE-281). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2017-8543?

CVE-2017-8543 affects microsoft windows 7; microsoft windows 8.1; microsoft windows 10 1507; microsoft windows 10 1511, and 6 more product(s). Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2017-8543 published, and has it been updated?

CVE-2017-8543 was published on June 15, 2017 and was last updated on April 22, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2022-05-24 — agencies required to remediate by 2022-06-14

CVE-2017-8543

CRITICAL

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…

Published

Jun 15, 2017

Updated

Apr 22, 2026

Affected

0 pkgs

Patched

None yet

Exploits

5 known

EPSS Exploitation Probability

via FIRST.org ↗

85.1%probability of exploitation in next 30 days

Very High Risk99th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

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".

Affected Products

10 products · 17 configurations

windows 7microsoft

all

windows 8.1microsoft

all

windows 10 1507microsoft

all

windows 10 1511microsoft

all

windows 10 1607microsoft

all

windows 10 1703microsoft

all

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, W…

portal.msrc.microsoft.comMSJul 2017

Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, W…

portal.msrc.microsoft.comGoogle-sheetJun 2017

Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, W…

adlab.venustech.com.cnAwesomePocJun 2020

Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, W…

cisa.govCISAMay 2022

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2017-8543 in your stack?

O3 detects CVE-2017-8543 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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