CVE-2013-3893

CRITICALNVD 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 — 3 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictMitigate nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 88%CVSS: 8.8Exploit: cisa kev · ssvc active · Metasploit · Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed services: Not assessed

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

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
9.0CRITICALhigh confidence
EG Risk
81
EG Risk 81/100CISA SSVC

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%
CISA SSVC: Track at low, Attend at medium and Act at high mission impact.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact, and watch the vendor's advisory for the fix.
EPSS PROB
88%
EPSS %ILE
99th
KEV
⚠ Exploited

CISA SSVCTrack at low, Attend at medium and Act at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact, and watch the vendor's advisory for the fix.

Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 18, 2013

Last Modified

April 22, 2026

Advisory Details (6)

Auto-updated May 2, 2026
No fix on record 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 48× in last 7d / 233× 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 1,004 total refreshes for this CVE.

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

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

    Microsoft Internet Explorer 8 - 'SetMouseCapture ' Use After Free

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2013-3893?
CVE-2013-3893 is a critical 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 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 attention. No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation, and watch the vendor's advisory for the fix.
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 (CRITICAL).
Which products are affected by CVE-2013-3893?
CVE-2013-3893 affects Microsoft Internet Explorer.
How do I remediate CVE-2013-3893?
No fix for CVE-2013-3893 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix.

Dependency Blast Radius

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