CVE-2018-8174

CRITICALNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-02-15), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.5 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
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 89%CVSS: 7.5Exploit: cisa kev · ssvc active · kev ransomware · epss top5pct · epss high · public exploitExposed: 0

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

A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine Remote Code Execution Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.

CVSS v3
7.5
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
89%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

May 9, 2018

Last Modified

August 13, 2026

Advisory Details (5)

Auto-updated Jun 4, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: microsoft, cisa.
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-2018-8174
generic🟡 PoC Available

Microsoft Internet Explorer 11 (Windows 7 x86/x64) - vbscript Code Execution - Windows local Exploit

https://www.exploit-db.com/exploits/44741/
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-2018-8174
generic🔴 Active Exploitation

Windows Updates Broke Your Networking? Free Micropatches To The Rescue (CVE-2018-8174)

https://blog.0patch.com/2018/05/a-single-instruction-micropatch-for.html
generic
http://www.securityfocus.com/bid/103998

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 80× in last 7d / 347× 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 1,117 total refreshes for this CVE.

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

Publicly available exploits

(6 references)

Working exploit code is in the public domain (5 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCruthlezs/ie11_vbscript_exploit
    First seen May 23, 2019

    Exploit Generator for CVE-2018-8174 & CVE-2019-0768 (RCE via VBScript Execution in IE11)

    Open source ↗
  • GitHub PoCpiotrflorczyk/cve-2018-8174_analysis
    First seen Jul 10, 2018

    Analysis of VBS exploit CVE-2018-8174

    Open source ↗
  • GitHub PoCSyFi/CVE-2018-8174
    First seen Jun 1, 2018

    MS Word MS WordPad via IE VBS Engine RCE

    Open source ↗
  • GitHub PoCYt1g3r/CVE-2018-8174_EXP
    First seen May 30, 2018

    CVE-2018-8174_python

    Open source ↗
  • GitHub PoC0x09AL/CVE-2018-8174-msf
    First seen May 22, 2018

    CVE-2018-8174 - VBScript memory corruption exploit.

    Open source ↗
  • Exploit-DBEDB-44741
    First seen May 21, 2018

    Microsoft Internet Explorer 11 (Windows 7 x86/x64) - vbscript Code Execution

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2018-8174?
CVE-2018-8174 is a critical vulnerability published on May 9, 2018. A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine Remote Code Execution Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1,…
When was CVE-2018-8174 disclosed?
CVE-2018-8174 was first published in the National Vulnerability Database on May 9, 2018, with the most recent update on August 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-8174 actively exploited?
Yes. CISA added CVE-2018-8174 to the Known Exploited Vulnerabilities catalog on February 15, 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-2018-8174?
CVE-2018-8174 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2018-8174?
CVE-2018-8174 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-2018-8174?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-8174, 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2018-8174

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