CVE-2016-0034

Microsoft Silverlight Runtime Remote Code Execution

8.8 HIGHActively exploited (CISA KEV)Used in ransomwareEPSS 69.4%

Published13 Jan 2016
Added to CISA KEV25 May 2022
Remediation due15 Jun 2022

Description

Microsoft Silverlight 5 before 5.1.41212.0 mishandles negative offsets during decoding, which allows remote attackers to execute arbitrary code or cause a denial of service (object-header corruption) via a crafted web site, aka "Silverlight Runtime Remote Code Execution Vulnerability."

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionRequired

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Microsoft Silverlight≥ 5.0 < 5.1.41212.0

Remediation

Fixed in

Microsoft Silverlight≥ 5.1.41212.0

Patch & vendor advisories

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-006

References

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-006PatchVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-0034US Government Resource
http://www.securitytracker.com/id/1034655Broken LinkThird Party AdvisoryVDB Entry

Frequently asked

Is CVE-2016-0034 being actively exploited?

Yes. CVE-2016-0034 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 25 May 2022. It has been used in ransomware campaigns.

How severe is CVE-2016-0034?

CVE-2016-0034 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 69.4% probability of exploitation.

Which products are affected by CVE-2016-0034?

Affected products include Microsoft Silverlight.

How do I fix CVE-2016-0034?

Upgrade affected software to a fixed version, for example Microsoft Silverlight 5.1.41212.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2016-0034 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.