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
Trending — 4 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: 70%CVSS: 5.5Exploit: cisa kev · ssvc active · Metasploit · Exploit-DB (verified) · 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.

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
9.0(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
70%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

October 9, 2013

Last Modified

April 22, 2026

Advisory Details (2)

Auto-updated May 20, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: 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-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 58× in last 7d / 209× 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 630 total refreshes for this CVE.

  1. 2026-08-22 05:22 UTCGHSA enrichment
  2. 2026-08-22 01:24 UTCEG score recompute
  3. 2026-08-22 01:24 UTCGHSA enrichment
  4. 2026-08-21 23:44 UTCEPSS rescore
  5. 2026-08-21 21:28 UTCGHSA enrichment
  6. 2026-08-21 17:31 UTCGHSA enrichment
  7. 2026-08-21 16:49 UTCCISA KEV update
  8. 2026-08-21 13:32 UTCGHSA enrichment
  9. 2026-08-21 09:31 UTCGHSA enrichment
  10. 2026-08-21 05:34 UTCGHSA enrichment
  11. 2026-08-21 01:36 UTCEG score recompute
  12. 2026-08-21 01:36 UTCGHSA enrichment
  13. 2026-08-20 22:50 UTCEPSS rescore
  14. 2026-08-20 21:39 UTCGHSA enrichment
  15. 2026-08-20 17:42 UTCGHSA enrichment
  16. 2026-08-20 17:06 UTCCISA KEV update
  17. 2026-08-20 13:45 UTCGHSA enrichment
  18. 2026-08-20 09:48 UTCGHSA enrichment
  19. 2026-08-20 05:51 UTCGHSA enrichment
  20. 2026-08-20 01:54 UTCGHSA enrichment
  21. 2026-08-19 21:57 UTCGHSA enrichment
  22. 2026-08-19 17:58 UTCEG score recompute
  23. 2026-08-19 17:58 UTCGHSA enrichment
  24. 2026-08-19 17:33 UTCCISA KEV update
  25. 2026-08-19 16:59 UTCEPSS rescore
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  1. 2026-08-19 14:00 UTCGHSA enrichment
  2. 2026-08-19 10:01 UTCGHSA enrichment
  3. 2026-08-19 06:03 UTCGHSA enrichment
  4. 2026-08-19 02:02 UTCGHSA enrichment
  5. 2026-08-18 22:04 UTCGHSA enrichment
  6. 2026-08-18 18:07 UTCGHSA enrichment
  7. 2026-08-18 16:58 UTCCISA KEV update
  8. 2026-08-18 14:07 UTCGHSA enrichment
  9. 2026-08-18 10:07 UTCGHSA enrichment
  10. 2026-08-18 10:06 UTCGHSA enrichment
  11. 2026-08-18 06:09 UTCGHSA enrichment
  12. 2026-08-18 02:10 UTCGHSA enrichment
  13. 2026-08-17 22:09 UTCGHSA enrichment
  14. 2026-08-17 18:12 UTCGHSA enrichment
  15. 2026-08-17 14:14 UTCEG score recompute
  16. 2026-08-17 14:14 UTCGHSA enrichment
  17. 2026-08-17 13:56 UTCCISA KEV update
  18. 2026-08-17 10:17 UTCGHSA enrichment
  19. 2026-08-17 06:20 UTCGHSA enrichment
  20. 2026-08-17 02:23 UTCGHSA enrichment
  21. 2026-08-16 22:26 UTCGHSA enrichment
  22. 2026-08-16 18:29 UTCGHSA enrichment
  23. 2026-08-16 14:32 UTCGHSA enrichment
  24. 2026-08-16 10:34 UTCGHSA enrichment
  25. 2026-08-16 06:36 UTCGHSA enrichment
  26. 2026-08-16 02:39 UTCEG score recompute
  27. 2026-08-16 02:39 UTCGHSA enrichment
  28. 2026-08-16 02:09 UTCEPSS rescore
  29. 2026-08-15 22:42 UTCGHSA enrichment
  30. 2026-08-15 18:45 UTCGHSA enrichment
  31. 2026-08-15 14:48 UTCGHSA enrichment
  32. 2026-08-15 10:51 UTCGHSA enrichment
  33. 2026-08-15 06:54 UTCGHSA enrichment
  34. 2026-08-15 02:57 UTCEG score recompute
  35. 2026-08-15 02:57 UTCGHSA enrichment
  36. 2026-08-15 01:25 UTCEPSS rescore
  37. 2026-08-14 22:59 UTCGHSA enrichment
  38. 2026-08-14 19:02 UTCGHSA enrichment
  39. 2026-08-14 15:05 UTCGHSA enrichment
  40. 2026-08-14 11:08 UTCGHSA enrichment
  41. 2026-08-14 07:11 UTCGHSA enrichment
  42. 2026-08-14 03:14 UTCGHSA enrichment
  43. 2026-08-13 23:17 UTCEG score recompute
  44. 2026-08-13 23:17 UTCGHSA enrichment
  45. 2026-08-13 19:20 UTCGHSA enrichment
  46. 2026-08-13 15:23 UTCGHSA enrichment
  47. 2026-08-13 11:26 UTCGHSA enrichment
  48. 2026-08-13 07:29 UTCGHSA enrichment
  49. 2026-08-13 03:32 UTCGHSA enrichment
  50. 2026-08-12 23:35 UTCGHSA enrichment
  51. 2026-08-12 19:38 UTCGHSA enrichment
  52. 2026-08-12 15:41 UTCEG score recompute
  53. 2026-08-12 15:41 UTCGHSA enrichment
  54. 2026-08-12 13:45 UTCEPSS rescore
  55. 2026-08-12 11:44 UTCGHSA enrichment
  56. 2026-08-12 07:46 UTCGHSA enrichment
  57. 2026-08-12 03:49 UTCGHSA enrichment
  58. 2026-08-11 23:51 UTCGHSA enrichment
  59. 2026-08-11 19:54 UTCGHSA enrichment
  60. 2026-08-11 19:32 UTCCISA KEV update
  61. 2026-08-11 15:57 UTCEG score recompute
  62. 2026-08-11 15:57 UTCGHSA enrichment
  63. 2026-08-11 12:00 UTCGHSA enrichment
  64. 2026-08-11 08:03 UTCGHSA enrichment
  65. 2026-08-11 04:05 UTCGHSA enrichment
  66. 2026-08-11 00:08 UTCGHSA enrichment
  67. 2026-08-10 20:11 UTCGHSA enrichment
  68. 2026-08-10 16:14 UTCGHSA enrichment
  69. 2026-08-10 12:17 UTCGHSA enrichment
  70. 2026-08-10 08:20 UTCGHSA enrichment
  71. 2026-08-10 04:23 UTCGHSA enrichment
  72. 2026-08-10 00:26 UTCGHSA enrichment
  73. 2026-08-09 20:29 UTCGHSA enrichment
  74. 2026-08-09 16:32 UTCGHSA enrichment
  75. 2026-08-09 12:35 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 in the National Vulnerability Database 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 patching attention.
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.
Which products are affected by CVE-2013-3896?
CVE-2013-3896 affects Microsoft Silverlight. 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-2013-3896?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2013-3896, 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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