Microsoft Silverlight 5 memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability classified as critical was found in Microsoft Silverlight 5 (Multimedia Player Software). This vulnerability affects some unknown processing. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Microsoft Silverlight 5 before 5.1.41105.00 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read or write access) via unspecified open and close requests, aka "Microsoft Silverlight RCE Vulnerability."

The weakness was presented 12/08/2015 with Microsoft as MS15-129 as confirmed bulletin (Technet). The advisory is available at This vulnerability was named CVE-2015-6166 since 08/14/2015. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 87251 (MS15-129: Security Update for Silverlight to Address Remote Code Execution (3106614) (Mac OS X)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 91139 (Microsoft Silverlight Remote Code Execution Vulnerability (MS15-129)).

Applying the patch MS15-129 is able to eliminate this problem. The bugfix is ready for download at A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (87251).







CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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Class: Memory corruption
CWE: CWE-119

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 87251
Nessus Name: MS15-129: Security Update for Silverlight to Address Remote Code Execution (3106614) (Mac OS X)
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OpenVAS ID: 103180
OpenVAS Name: Microsoft Silverlight Remote Code Execution Vulnerability (3106614)
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Threat Intelligenceinfo

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Recommended: Patch
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Patch: MS15-129


08/14/2015 🔍
12/08/2015 +116 days 🔍
12/08/2015 +0 days 🔍
12/08/2015 +0 days 🔍
12/08/2015 +0 days 🔍
12/08/2015 +0 days 🔍
12/09/2015 +1 days 🔍
12/09/2015 +0 days 🔍
12/09/2015 +0 days 🔍
06/29/2022 +2394 days 🔍



Advisory: MS15-129
Organization: Microsoft
Status: Confirmed

CVE: CVE-2015-6166 (🔍)
SecurityTracker: 1034321
Vulnerability Center: 54888 - [MS15-129] Microsoft Silverlight and Silverlight Developer Runtime Remote Code Execution - CVE-2015-6166, Critical
SecurityFocus: 78505 - Microsoft Silverlight CVE-2015-6166 Remote Code Execution Vulnerability


Created: 12/09/2015 12:16 PM
Updated: 06/29/2022 08:37 AM
Changes: 12/09/2015 12:16 PM (65), 05/12/2018 09:20 AM (13), 06/29/2022 08:37 AM (3)
Complete: 🔍
Cache ID: 3:C3D:40


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