{"id":"CVE-2023-36563","kind":"vulnerability","aliases":["CVE-2023-36563"],"related":[],"title":"Microsoft WordPad Information Disclosure Vulnerability","description":"Microsoft WordPad contains an unspecified vulnerability that allows for information disclosure.\n\nCISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","summary":"Microsoft WordPad contains an unspecified flaw that lets an attacker read information it should not expose. CISA lists it as actively exploited in the wild.","severity":"medium","cvss":6.5,"epss":null,"exploited":true,"exploited_at":"2023-10-10T00:00:00+00:00","products":[{"name":"Microsoft WordPad","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 10 1507","fixed":["10.0.10240.20232"],"affected":"< 10.0.10240.20232","ecosystem":"vendor"},{"name":"microsoft windows 10 1607","fixed":["10.0.14393.6351"],"affected":"< 10.0.14393.6351","ecosystem":"vendor"},{"name":"microsoft windows 10 1809","fixed":["10.0.17763.4974"],"affected":"< 10.0.17763.4974","ecosystem":"vendor"},{"name":"microsoft windows 10 21h2","fixed":["10.0.19041.3570"],"affected":"< 10.0.19041.3570","ecosystem":"vendor"},{"name":"microsoft windows 10 22h2","fixed":["10.0.19045.3570"],"affected":"< 10.0.19045.3570","ecosystem":"vendor"},{"name":"microsoft windows 11 21h2","fixed":["10.0.22000.2538"],"affected":"< 10.0.22000.2538","ecosystem":"vendor"},{"name":"microsoft windows 11 22h2","fixed":["10.0.22621.2428"],"affected":"< 10.0.22621.2428","ecosystem":"vendor"},{"name":"microsoft windows server 2008","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2008","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows server 2016","fixed":["10.0.14393.6351"],"affected":"< 10.0.14393.6351","ecosystem":"vendor"},{"name":"microsoft windows server 2019","fixed":["10.0.17763.4974"],"affected":"< 10.0.17763.4974","ecosystem":"vendor"},{"name":"microsoft windows server 2022","fixed":["10.0.20348.2031"],"affected":"< 10.0.20348.2031","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","windows","wordpad"],"not_affected_if":["wordpad-not-installed"],"how_to_check":null,"fix":"Apply mitigations per vendor instructions, or discontinue use of WordPad if mitigations are unavailable (per CISA required action).","status":"open","published_at":"2023-10-10T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T21:04:26+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-10-23T21:04:26Z","model":"claude-haiku-5-5","output":{"fix":"Apply mitigations per vendor instructions, or discontinue use of WordPad if mitigations are unavailable (per CISA required action).","reach":"unknown","impact":"low","summary":"Microsoft WordPad contains an unspecified flaw that lets an attacker read information it should not expose. CISA lists it as actively exploited in the wild.","category":"infrastructure","who_cares":["windows","wordpad"],"confidence":0.5,"needs_auth":"unknown","worst_case":"Attacker reads information disclosed by WordPad; exact data unknown.","analyst_note":"Sources give no affected or fixed versions and no exploit details; check the Microsoft Security Response Center advisory for CVE-2023-36563 for mitigation steps and patch status.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["wordpad-not-installed"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000452,"input_tokens":2792,"output_tokens":345,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2023':7A,10A '-36563':8A,11A '10':16A,20A,24A,28A,32A '11':36A,40A '1507':17A '1607':21A '1809':25A '2008':45A,49A '2012':53A,57A '2016':61A '2019':65A '2022':69A '21h2':29A,37A '22h2':33A,41A 'action':112C 'activ':94B 'allow':106C 'appli':113C 'attack':83B 'cisa':90B,110C 'contain':76B,101C 'cve':6A,9A 'disclosur':4A,109C 'discontinu':119C 'exploit':70B,95B 'expos':89B 'flaw':79B 'inform':3A,85B,108C 'infrastructur':71B 'instruct':117C 'let':81B 'list':91B 'microsoft':1A,12A,14A,18A,22A,26A,30A,34A,38A,42A,46A,50A,54A,58A,62A,66A,74B,99C 'mitig':114C,125C 'per':115C 'product':123C 'read':84B 'requir':111C 'server':44A,48A,52A,56A,60A,64A,68A 'unavail':127C 'unspecifi':78B,103C 'use':120C 'vendor':116C 'vulner':5A,104C 'wild':98B 'window':72B 'windows':15A,19A,23A,27A,31A,35A,39A,43A,47A,51A,55A,59A,63A,67A 'wordpad':2A,13A,73B,75B,100C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-10-10T00:00:00+00:00","kev":{"dateAdded":"2023-10-10","dueDate":"2023-10-31","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2023-36563","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-36563","severity":null,"published_at":"2023-10-10T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T16:39:47+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-36563","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-36563","severity":null,"published_at":"2023-10-10T18:15:13+00:00","modified_at":"2026-06-17T06:06:32+00:00","first_seen_at":"2026-10-23T22:29:04+00:00","fetched_at":"2026-10-23T22:29:04+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"}