CVE-2013-3896
MediumExploitedPublic exploitMicrosoft 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."
Published Oct 9, 2013 · Updated Apr 22, 2026
Key Facts
Patch immediately- CVE-2013-3896 is a medium-severity vulnerability (CVSS 5.5 v3.1) affecting Silverlight (Microsoft).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 11, 2021 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 68% probability of exploitation in the next 30 days.
- Fixed versions are available, including Silverlight 5.1.20913.0.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
5.5
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
68%
Higher than 99.3% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2013-3896 brief as a PDF
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Description
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."
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | May 25, 2022 | Jun 15, 2022 | Not reported |
| Industry KEV feed | Feb 11, 2021 | Jun 15, 2022 | Known |
| CIRCL KEV | May 25, 2022 | Jun 15, 2022 | Not reported |
| ENISA EUVD | May 25, 2022 | n/a | Not reported |
Required action: The impacted product is end-of-life and should be disconnected if still in use.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| SilverlightMicrosoft | See advisory | 5.1.20913.0 |
Patched Releases
Silverlight
5.1.20913.0
Timeline
Publicly disclosed
Oct 9, 2013
Added to Industry KEV feed
Feb 11, 2021
Added to CISA KEV
May 25, 2022
Added to CIRCL KEV
May 25, 2022
Added to ENISA EUVD
May 25, 2022
Last updated
Apr 22, 2026
References
- advisoryTA13-288A
- patchMS13-087
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitMSF ms13_022_silverlight_script_object.rb
FAQ
Common Questions.
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."
Affected: Silverlight (Microsoft). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 11, 2021 and is known to be used in ransomware campaigns.
Yes. It was added on May 25, 2022 with a federal remediation due date of Jun 15, 2022.
Public exploit code is available.
Fixed versions are available, including Silverlight 5.1.20913.0.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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