---
id: CVE-2016-0034
title: >-
  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
  "Silverli…
summary: >-
  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
  "Silverli…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
vendor: microsoft
product: silverlight
affected:
  - 'silverlight >= 5.0, < 5.1.41212.0'
patched:
  - silverlight 5.1.41212.0
published: '2016-01-13'
updated: '2026-08-14'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2016-0034'
references:
  - url: 'http://www.securitytracker.com/id/1034655'
    label: secure@microsoft.com
  - url: >-
      https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-006
    label: secure@microsoft.com
  - url: 'http://www.securitytracker.com/id/1034655'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-006
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-0034
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - kev
  - in-the-wild
epss: 0.69397
epssPercentile: 0.99346
kev: true
kevDateAdded: '2022-05-25'
kevDueDate: '2022-06-15'
kevRansomware: true
exploited: true
zeroDay: true
ingestedAt: '2026-08-14T06:15:27.286Z'
---

## Overview

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."

## Affected

- `silverlight >= 5.0, < 5.1.41212.0`

## Remediation

Upgrade past the affected range:

- `silverlight 5.1.41212.0`