CVE-2013-3896
Published: May 25, 2022
Official Description
Microsoft Silverlight does not properly validate pointers during access to Silverlight elements, which allows remote attackers to obtain sensitive information via a crafted Silverlight application.
CISA KEV Advisory
Microsoft Silverlight Information Disclosure Vulnerability
Microsoft Silverlight does not properly validate pointers during access to Silverlight elements, which allows remote attackers to obtain sensitive information via a crafted Silverlight application.
The impacted product is end-of-life and should be disconnected if still in use.
Risk Analysis
Microsoft Silverlight has an information disclosure vulnerability due to improper pointer validation when accessing Silverlight elements. This allows remote attackers to obtain sensitive information via a crafted Silverlight application. The high EPSS score of 0.81590 indicates a very high likelihood of exploitation, and its presence in CISA's KEV catalog confirms active exploitation.
Active exploitation of this vulnerability has been observed in the wild, indicating a significant risk to Silverlight users. It is remotely exploitable.
Apply the latest security updates for Microsoft Silverlight to mitigate this information disclosure vulnerability. Consider uninstalling Silverlight if it is no longer required.
Technical Analysis
CVE-2013-3896 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2013-3896 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2013-3896 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1