CVE-2013-3896

CRITICALNVD 5.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-05-25), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 5.5 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Exploited 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: 68%CVSS: 5.5Exploit: cisa kev · ssvc active · Metasploit · Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

Microsoft Silverlight 5 before 5.1.20913.0 does not properly validate pointers during access to Silverlight elements, which allows remote attackers to obtain sensitive information via a crafted Silverlight application, aka "Silverlight Vulnerability."

CVSS v3
5.5
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 or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low or medium mission impact and sooner than that at high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
EPSS PROB
68%
EPSS %ILE
99th
KEV
⚠ Exploited

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low or medium mission impact and sooner than that at high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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

October 9, 2013

Last Modified

April 22, 2026

Advisory Details (2)

Auto-updated May 20, 2026
⚠️ Active exploitation confirmed. Fix referenced — no release confirmed yet. Sources: cisa.
cisa🔴 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-2013-3896
generic

Microsoft Security Bulletin MS13-087 - Important | Microsoft Learn

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-087

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 49× in last 7d / 231× 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 974 total refreshes for this CVE.

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

Publicly available exploits

(2 references)

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

  • Exploit-DBEDB-41702✓ verified
    First seen Mar 12, 2013

    Microsoft Silverlight - ScriptObject Unsafe Memory Access (MS13-022/MS13-087) (Metasploit)

    Open source ↗
  • Metasploitexploit/windows/browser/ms13_022_silverlight_script_object✓ verified
    First seen Mar 12, 2013

    MS13-022 Microsoft Silverlight ScriptObject Unsafe Memory Access

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2013-3896?
CVE-2013-3896 is a critical vulnerability published on October 9, 2013. Microsoft Silverlight 5 before 5.1.20913.0 does not properly validate pointers during access to Silverlight elements, which allows remote attackers to obtain sensitive information via a crafted Silverlight application, aka "Silverlight Vulnerability."
When was CVE-2013-3896 disclosed?
CVE-2013-3896 was first published on October 9, 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-2013-3896 actively exploited?
Yes. CISA added CVE-2013-3896 to the Known Exploited Vulnerabilities catalog on May 25, 2022, affecting Microsoft Silverlight. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
What is the CVSS score of CVE-2013-3896?
CVE-2013-3896 has a CVSS v3 base score of 5.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0 (CRITICAL).
Which products are affected by CVE-2013-3896?
CVE-2013-3896 affects Microsoft Silverlight.
How do I remediate CVE-2013-3896?
A fix for CVE-2013-3896 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

Dependency Blast Radius

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