---
id: "CVE-2013-0074"
kind: "vulnerability"
aliases: ["CVE-2013-0074"]
title: "Microsoft Silverlight: Microsoft Silverlight Double Dereference Vulnerability"
severity: "critical"
cvss: 9.3
epss: 0.78885
exploited: true
status: "open"
category: "other"
products: [{"name": "Microsoft Silverlight", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["browsers", "exploited", "other", "ransomware", "silverlight", "windows"]
not_affected_if: ["no-silverlight-installed"]
published_at: "2013-03-13T00:55:01+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2013-0074", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2013-0074", "first_seen_at": "2026-10-23T19:13:45+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2013-0074", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Microsoft Silverlight: Microsoft Silverlight Double Dereference Vulnerability

Microsoft Silverlight mishandles pointers while rendering HTML objects, so a crafted Silverlight application can make the browser run attacker code. The flaw is listed in CISA's Known Exploited Vulnerabilities catalog with a ransomware tag.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Microsoft Silverlight affected ? fixed ?

## How to check

Look for Silverlight installed on the machine (Programs and Features on Windows, or the browser add-ons list).

## Fix

Remove Silverlight from the machine, since the product is end-of-life and CISA says to disconnect it if still in use.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2013-0074
- 2026-10-23T19:13:45+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2013-0074
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2013-0074

## From the sources

Microsoft Silverlight 5, and 5 Developer Runtime, before 5.1.20125.0 does not properly validate pointers during HTML object rendering, which allows remote attackers to execute arbitrary code via a crafted Silverlight application, aka "Silverlight Double Dereference Vulnerability."

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_