CVE-2013-3893

HIGHNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2025-08-12), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
8.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 86%CVSS: 8.8Exploit: NoneExposed: 0

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

Use-after-free vulnerability in the SetMouseCapture implementation in mshtml.dll in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code via crafted JavaScript strings, as demonstrated by use of an ms-help: URL that triggers loading of hxds.dll.

CVSS v3
8.8
EG Score
9.0(high)
EPSS
99.7%
KEV
⚠ Exploited

Published

September 18, 2013

Last Modified

April 22, 2026

Advisory Details (6)

Auto-updated May 2, 2026
No patch confirmed yet.
generic

Microsoft Security Bulletin MS13-080 - Critical | Microsoft Learn

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-080
generic
http://www.securityfocus.com/bid/62453
generic

Packet Storm

http://packetstormsecurity.com/files/162585/Microsoft-Internet-Explorer-8-SetMouseCapture-Use-After-Free.html
generic

JVN#27443259: Internet Explorer vulnerable to arbitrary code execution

http://jvn.jp/en/jp/JVN27443259/index.html
generic

Archived MSDN and TechNet Blogs | Microsoft Learn

http://blogs.technet.com/b/srd/archive/2013/10/08/ms13-080-addresses-two-vulnerabilities-under-limited-targeted-attacks.aspx
generic

Archived MSDN and TechNet Blogs | Microsoft Learn

http://blogs.technet.com/b/srd/archive/2013/09/17/cve-2013-3893-fix-it-workaround-available.aspx

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 97× in last 7d / 423× 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 568 total refreshes for this CVE.

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

Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 Metasploit module) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-49872
    First seen May 17, 2021

    Microsoft Internet Explorer 8 - 'SetMouseCapture ' Use After Free

    Open source ↗
  • Exploit-DBEDB-28682✓ verified
    First seen Oct 2, 2013

    Micorosft Internet Explorer - SetMouseCapture Use-After-Free (Metasploit)

    Open source ↗
  • Metasploitexploit/windows/browser/ie_setmousecapture_uaf✓ verified
    First seen Sep 17, 2013

    MS13-080 Microsoft Internet Explorer SetMouseCapture Use-After-Free

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2013-3893?
CVE-2013-3893 is a high vulnerability published on September 18, 2013. Use-after-free vulnerability in the SetMouseCapture implementation in mshtml.dll in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code via crafted JavaScript strings, as demonstrated by use of an ms-help: URL that triggers loading of hxds.dll.
When was CVE-2013-3893 disclosed?
CVE-2013-3893 was first published in the National Vulnerability Database on September 18, 2013, 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-2013-3893 actively exploited?
Yes. CISA added CVE-2013-3893 to the Known Exploited Vulnerabilities catalog on August 12, 2025, affecting Microsoft Internet Explorer. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2013-3893?
CVE-2013-3893 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2013-3893?
CVE-2013-3893 affects Microsoft Internet Explorer. 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-2013-3893?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2013-3893, 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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