# CVE-2016-0034: Microsoft Silverlight Runtime Remote Code Execution Vulnerability

Source: https://junglewise.ai/threats/cve-2016-0034-microsoft-silverlight-runtime-remote-code-execution-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-05-25. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2016-0034 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2022-05-25

Microsoft Silverlight mishandles negative offsets during decoding, leading to object-header corruption. This vulnerability allows remote attackers to execute arbitrary code or cause a denial of service via a crafted website.

Technologies: [Microsoft Silverlight](https://junglewise.ai/threats/technologies/silverlight). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2016-0034 exploited in the wild?** Yes. CVE-2016-0034 is known to be exploited in the wild, first recorded on 25 May 2022. Treat it as urgent.

**How severe is CVE-2016-0034?** Critical severity, with a CVSS score of 8.8, published 25 May 2022.

**Which products and versions are affected?** Microsoft Silverlight 5 before 5.1.41212.0.

**Is there a fix for CVE-2016-0034?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2016-0034 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2016-0034?** Check whether you run Microsoft Silverlight. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Microsoft Silverlight 5 before 5.1.41212.0

## Timeline

- 2016-01-13: disclosed: Initial NVD publication date
- 2016-01-13: advisory: Microsoft security bulletin MS16-006 released
- 2022-05-25: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2022-05-25: exploited: Confirmed exploited in the wild per CISA KEV entry

## Related threats

- [Microsoft Silverlight Information Disclosure Vulnerability](https://junglewise.ai/threats/cve-2013-3896-microsoft-silverlight-information-disclosure-vulnerability)
- [Microsoft Silverlight Double Dereference Vulnerability](https://junglewise.ai/threats/cve-2013-0074-microsoft-silverlight-double-dereference-vulnerability)