{"id":"CVE-2013-3896","kind":"vulnerability","aliases":["CVE-2013-3896"],"related":[],"title":"Microsoft Silverlight: Microsoft Silverlight Information Disclosure Vulnerability","description":"Microsoft Silverlight does not properly validate pointers during access to Silverlight elements, which allows remote attackers to obtain sensitive information via a crafted Silverlight application.\n\nCISA required action: The impacted product is end-of-life and should be disconnected if still in use.","summary":"Microsoft Silverlight fails to validate pointers when accessing Silverlight elements, so a crafted Silverlight application can leak sensitive memory contents. An attacker who gets a user to run such an application can read information from the browser process.","severity":"medium","cvss":5.5,"epss":0.67959,"exploited":true,"exploited_at":"2022-05-25T00:00:00+00:00","products":[{"name":"Microsoft Silverlight","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["browsers","exploited","other","silverlight","windows"],"not_affected_if":["no-silverlight-installed"],"how_to_check":"Check whether Microsoft Silverlight is installed on any machine, for example under C:\\Program Files\\Microsoft Silverlight or in the browser add-on list.","fix":"Uninstall Microsoft Silverlight, since the product is end-of-life and CISA says to disconnect it if still in use.","status":"open","published_at":"2013-10-09T14:53:25+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:15:31+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-10-23T21:15:31Z","model":"claude-haiku-5-5","output":{"fix":"Uninstall Microsoft Silverlight, since the product is end-of-life and CISA says to disconnect it if still in use.\nunknown","reach":"internet","impact":"low","summary":"Microsoft Silverlight fails to validate pointers when accessing Silverlight elements, so a crafted Silverlight application can leak sensitive memory contents. An attacker who gets a user to run such an application can read information from the browser process.","category":"other","who_cares":["windows","browsers","silverlight"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker reads sensitive memory via a crafted Silverlight application","analyst_note":"Confirm the fixed Silverlight version and the affected version range from the Microsoft bulletin (MS13-042 or the CVE-2013-3896 advisory) since the sources give no fixed version.","how_to_check":"Check whether Microsoft Silverlight is installed on any machine, for example under C:\\Program Files\\Microsoft Silverlight or in the browser add-on list.\nunknown","needs_analyst":true,"not_affected_if":["no-silverlight-installed"],"user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.0005,"input_tokens":2852,"output_tokens":430,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2013':9A,12A '-3896':10A,13A 'access':28B,67C 'action':86C 'allow':72C 'applic':35B,51B,83C 'attack':42B,74C 'browser':16B,57B 'cisa':84C 'content':40B 'craft':33B,81C 'cve':8A,11A 'disclosur':6A 'disconnect':98C 'element':30B,70C 'end':92C 'end-of-lif':91C 'exploit':17B 'fail':23B 'get':44B 'impact':88C 'inform':5A,54B,78C 'leak':37B 'life':94C 'memori':39B 'microsoft':1A,3A,14A,21B,59C 'obtain':76C 'pointer':26B,65C 'process':58B 'product':89C 'proper':63C 'read':53B 'remot':73C 'requir':85C 'run':48B 'sensit':38B,77C 'silverlight':2A,4A,15A,19B,22B,29B,34B,60C,69C,82C 'still':100C 'use':102C 'user':46B 'valid':25B,64C 'via':79C 'vulner':7A 'window':20B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2013-10-09T14:53:25+00:00","kev":{"dateAdded":"2022-05-25","dueDate":"2022-06-15","requiredAction":"The impacted product is end-of-life and should be disconnected if still in use.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2013-3896","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2013-3896","severity":null,"published_at":"2022-05-25T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T10:39:06+00:00","note":null},{"source":"epss","external_id":"CVE-2013-3896","url":"https://api.first.org/data/v1/epss?cve=CVE-2013-3896","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:45+00:00","fetched_at":"2026-10-23T19:13:45+00:00","note":null},{"source":"nvd","external_id":"CVE-2013-3896","url":"https://nvd.nist.gov/vuln/detail/CVE-2013-3896","severity":null,"published_at":"2013-10-09T14:53:25+00:00","modified_at":"2026-06-16T23:55:58+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}