CVE-2017-8543

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-05-24), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 5 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 64%CVSS: 9.8Exploit: cisa kev · ssvc active · epss top5pct · epss highExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
64%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

June 15, 2017

Last Modified

April 22, 2026

Advisory Details (4)

Auto-updated May 12, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa, microsoft.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-8543
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8543
generic
http://www.securitytracker.com/id/1038667
generic
http://www.securityfocus.com/bid/98824

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 59× in last 7d / 338× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 708 total refreshes for this CVE.

  1. 2026-07-27 08:19 UTCVendor advisory
  2. 2026-07-27 08:19 UTCGHSA enrichment
  3. 2026-07-27 04:04 UTCVendor advisory
  4. 2026-07-27 04:04 UTCGHSA enrichment
  5. 2026-07-26 23:49 UTCVendor advisory
  6. 2026-07-26 23:49 UTCGHSA enrichment
  7. 2026-07-26 19:34 UTCVendor advisory
  8. 2026-07-26 19:34 UTCGHSA enrichment
  9. 2026-07-26 15:18 UTCEG score recompute
  10. 2026-07-26 15:18 UTCVendor advisory
  11. 2026-07-26 15:18 UTCGHSA enrichment
  12. 2026-07-26 14:51 UTCEPSS rescore
  13. 2026-07-26 14:51 UTCEPSS rescore
  14. 2026-07-26 11:03 UTCEG score recompute
  15. 2026-07-26 11:03 UTCVendor advisory
  16. 2026-07-26 11:03 UTCGHSA enrichment
  17. 2026-07-26 06:47 UTCVendor advisory
  18. 2026-07-26 06:47 UTCGHSA enrichment
  19. 2026-07-26 02:31 UTCEG score recompute
  20. 2026-07-26 02:31 UTCVendor advisory
  21. 2026-07-26 02:31 UTCGHSA enrichment
  22. 2026-07-23 01:30 UTCEG score recompute
  23. 2026-07-22 22:21 UTCVendor advisory
  24. 2026-07-22 22:21 UTCGHSA enrichment
  25. 2026-07-22 22:10 UTCEG score recompute
Show 75 more
  1. 2026-07-22 19:40 UTCCISA KEV update
  2. 2026-07-22 18:04 UTCEG score recompute
  3. 2026-07-22 18:03 UTCGHSA enrichment
  4. 2026-07-22 14:04 UTCEPSS rescore
  5. 2026-07-22 13:44 UTCGHSA enrichment
  6. 2026-07-22 09:28 UTCVendor advisory
  7. 2026-07-22 09:28 UTCGHSA enrichment
  8. 2026-07-22 05:12 UTCVendor advisory
  9. 2026-07-22 05:12 UTCGHSA enrichment
  10. 2026-07-22 00:52 UTCVendor advisory
  11. 2026-07-22 00:52 UTCGHSA enrichment
  12. 2026-07-21 20:00 UTCVendor advisory
  13. 2026-07-21 20:00 UTCGHSA enrichment
  14. 2026-07-21 15:41 UTCEG score recompute
  15. 2026-07-21 15:41 UTCVendor advisory
  16. 2026-07-21 15:41 UTCGHSA enrichment
  17. 2026-07-21 15:21 UTCEPSS rescore
  18. 2026-07-21 14:37 UTCCISA KEV update
  19. 2026-07-21 11:26 UTCVendor advisory
  20. 2026-07-21 11:26 UTCGHSA enrichment
  21. 2026-07-21 07:08 UTCVendor advisory
  22. 2026-07-21 07:08 UTCGHSA enrichment
  23. 2026-07-21 02:52 UTCVendor advisory
  24. 2026-07-21 02:52 UTCGHSA enrichment
  25. 2026-07-20 22:35 UTCVendor advisory
  26. 2026-07-20 22:35 UTCGHSA enrichment
  27. 2026-07-20 18:19 UTCEG score recompute
  28. 2026-07-20 18:19 UTCVendor advisory
  29. 2026-07-20 18:19 UTCGHSA enrichment
  30. 2026-07-20 17:04 UTCEPSS rescore
  31. 2026-07-20 17:04 UTCEPSS rescore
  32. 2026-07-20 14:04 UTCGHSA enrichment
  33. 2026-07-20 09:48 UTCVendor advisory
  34. 2026-07-20 09:48 UTCGHSA enrichment
  35. 2026-07-20 05:34 UTCVendor advisory
  36. 2026-07-20 05:34 UTCGHSA enrichment
  37. 2026-07-20 01:18 UTCVendor advisory
  38. 2026-07-20 01:18 UTCGHSA enrichment
  39. 2026-07-19 21:02 UTCVendor advisory
  40. 2026-07-19 21:02 UTCGHSA enrichment
  41. 2026-07-19 16:47 UTCEG score recompute
  42. 2026-07-19 16:47 UTCVendor advisory
  43. 2026-07-19 16:47 UTCGHSA enrichment
  44. 2026-07-19 14:28 UTCEPSS rescore
  45. 2026-07-19 14:28 UTCEPSS rescore
  46. 2026-07-19 12:32 UTCVendor advisory
  47. 2026-07-19 12:32 UTCGHSA enrichment
  48. 2026-07-19 08:14 UTCVendor advisory
  49. 2026-07-19 08:14 UTCGHSA enrichment
  50. 2026-07-19 03:59 UTCVendor advisory
  51. 2026-07-19 03:59 UTCGHSA enrichment
  52. 2026-07-18 23:44 UTCGHSA enrichment
  53. 2026-07-18 19:29 UTCVendor advisory
  54. 2026-07-18 19:29 UTCGHSA enrichment
  55. 2026-07-18 15:13 UTCVendor advisory
  56. 2026-07-18 15:13 UTCGHSA enrichment
  57. 2026-07-18 10:57 UTCVendor advisory
  58. 2026-07-18 10:57 UTCGHSA enrichment
  59. 2026-07-18 06:42 UTCVendor advisory
  60. 2026-07-18 06:42 UTCGHSA enrichment
  61. 2026-07-18 02:27 UTCVendor advisory
  62. 2026-07-18 02:27 UTCGHSA enrichment
  63. 2026-07-17 22:12 UTCVendor advisory
  64. 2026-07-17 22:12 UTCGHSA enrichment
  65. 2026-07-17 17:56 UTCVendor advisory
  66. 2026-07-17 17:56 UTCGHSA enrichment
  67. 2026-07-17 13:38 UTCVendor advisory
  68. 2026-07-17 13:38 UTCGHSA enrichment
  69. 2026-07-17 09:23 UTCEG score recompute
  70. 2026-07-17 09:23 UTCVendor advisory
  71. 2026-07-17 09:23 UTCGHSA enrichment
  72. 2026-07-17 05:08 UTCVendor advisory
  73. 2026-07-17 05:08 UTCGHSA enrichment
  74. 2026-07-17 00:52 UTCVendor advisory
  75. 2026-07-17 00:52 UTCGHSA enrichment

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Frequently asked(6)

What is CVE-2017-8543?
CVE-2017-8543 is a critical vulnerability published on June 15, 2017. 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…
When was CVE-2017-8543 disclosed?
CVE-2017-8543 was first published in the National Vulnerability Database on June 15, 2017, with the most recent update on April 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-8543 actively exploited?
Yes. CISA added CVE-2017-8543 to the Known Exploited Vulnerabilities catalog on May 24, 2022, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2017-8543?
CVE-2017-8543 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2017-8543?
CVE-2017-8543 affects Microsoft Windows. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2017-8543?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-8543, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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