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Medium 5.5Known exploited (CISA KEV)Published Oct 9, 2013

CVE-2013-3896Microsoft 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 Silve…

Updated under an hour ago ()

Does this affect you?

It affects microsoft silverlight. Add what you run to find out whether that includes you.

CISA lists it as known exploited since May 25, 2022; federal agencies had to remediate by Jun 15, 2022. Treat that date as your deadline.

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
5.5 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness (CWE)
Not given
Known exploited
Added to CISA KEV May 25, 2022; federal remediation due Jun 15, 2022The impacted product is end-of-life and should be disconnected if still in use.
EPSS (exploitation in the next 30 days)
67.96% (percentile 99)
Assigned by
microsoft
NVD analysis
Analyzed
Record last updated
Oct 22, 2025
First seen by InfoSec Signals
Oct 9, 2026

Affected products

Affected products
microsoft silverlight
microsoft:silverlight
from 5.0 before 5.1.20913.0
NVD

References

  • vendor-advisory, x-refsource-ms, patch
  • vdb-entry, signature, x-refsource-oval, broken-link
  • third-party-advisory, x-refsource-cert, us-government-resource
  • vdb-entry, signature, x-refsource-oval, broken-link
  • us-government-resource

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.

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