{"id":"CVE-2017-0261","kind":"vulnerability","aliases":["CVE-2017-0261"],"related":[],"title":"Microsoft Office: Microsoft Office Use-After-Free Vulnerability","description":"Microsoft Office 2010 SP2, Office 2013 SP1, and Office 2016 allow a remote code execution vulnerability when the software fails to properly handle objects in memory, aka \"Office Remote Code Execution Vulnerability\". This CVE ID is unique from CVE-2017-0262 and CVE-2017-0281.","summary":"Microsoft Office has a use-after-free memory bug that lets an attacker run code on the victim's machine. It is listed in CISA's known-exploited catalog, so attacks have been seen in the wild.","severity":"critical","cvss":9.3,"epss":0.7813,"exploited":true,"exploited_at":"2022-03-03T00:00:00+00:00","products":[{"name":"Microsoft Office","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","microsoft-office","other","windows"],"not_affected_if":["office-not-installed"],"how_to_check":null,"fix":"Apply the Microsoft Office updates per vendor instructions, as CISA requires. Exact patched builds are unknown from the sources.","status":"open","published_at":"2017-05-12T14:29:04+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:26:22+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-10-23T21:26:22Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft Office updates per vendor instructions, as CISA requires. Exact patched builds are unknown from the sources.","reach":"unknown","impact":"high","summary":"Microsoft Office has a use-after-free memory bug that lets an attacker run code on the victim's machine. It is listed in CISA's known-exploited catalog, so attacks have been seen in the wild.","category":"other","who_cares":["microsoft-office","windows"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker runs code on the victim's computer through a crafted document","analyst_note":"Find affected and fixed Office builds and the Microsoft advisory for CVE-2017-0261 via the NVD or MSRC entry; sources give no version data.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["office-not-installed"],"user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000451,"input_tokens":2805,"output_tokens":340,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-0261':12A,15A '-0262':103C '-0281':107C '-2017':11A,14A,102C,106C '2010':65C '2013':68C '2016':72C 'aka':89C 'allow':73C 'attack':37B,56B 'bug':33B 'catalog':54B 'cisa':49B 'code':39B,76C,92C 'cve':10A,13A,96C,101C,105C 'execut':77C,93C 'exploit':18B,53B 'fail':82C 'free':8A,31B 'handl':85C 'id':97C 'known':52B 'known-exploit':51B 'let':35B 'list':47B 'machin':44B 'memori':32B,88C 'microsoft':1A,3A,16A,20B,24B,63C 'microsoft-offic':19B 'object':86C 'offic':2A,4A,21B,25B,64C,67C,71C,90C 'office':17A 'proper':84C 'remot':75C,91C 'run':38B 'seen':59B 'softwar':81C 'sp1':69C 'sp2':66C 'uniqu':99C 'use':6A,29B 'use-after-fre':5A,28B 'victim':42B 'vulner':9A,78C,94C 'wild':62B 'window':23B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2017-05-12T14:29:04+00:00","kev":{"dateAdded":"2022-03-03","dueDate":"2022-03-24","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2017-0261","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2017-0261","severity":null,"published_at":"2022-03-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T10:39:07+00:00","note":null},{"source":"epss","external_id":"CVE-2017-0261","url":"https://api.first.org/data/v1/epss?cve=CVE-2017-0261","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2017-0261","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-0261","severity":null,"published_at":"2017-05-12T14:29:04+00:00","modified_at":"2026-06-17T00:57:21+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"}