{"id":"CVE-2026-111584","kind":"vulnerability","aliases":["CVE-2026-111584"],"related":[],"title":"TeamViewer Patch Management for Windows: installer race lets low-privilege users run code as admin","description":"A race condition in the installation\nprocess of TeamViewer Remote Management - Patch Management for Windows prior to\nversion 26.9.1 allows a local authenticated attacker with low privileges to\nexecute arbitrary code with elevated privileges by replacing the service\nexecutable in an insufficiently protected temporary directory during Patch\nManagement activation.","summary":"A race condition during installation of TeamViewer Remote Management Patch Management for Windows, before version 26.9.1, lets a local user with low privileges replace the service executable in an insufficiently protected temporary directory. The attacker can then run arbitrary code with elevated privileges.","severity":"high","cvss":7.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["other","remote-management","teamviewer","windows"],"not_affected_if":["patch-management-not-installed"],"how_to_check":"- Check the installed TeamViewer Remote Management Patch Management version on Windows machines and compare it to `26.9.1`\n- unknown","fix":"- Update TeamViewer Remote Management Patch Management for Windows to `26.9.1` or later\n- unknown","status":"open","published_at":"2026-10-27T16:17:29+00:00","first_seen_at":"2026-10-27T16:33:07+00:00","triaged_at":"2026-10-27T16:34:16+00:00","updated_at":"2026-10-27T16:34:16+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-10-27T16:34:16Z","model":"claude-haiku-5-5","output":{"fix":"- Update TeamViewer Remote Management Patch Management for Windows to `26.9.1` or later\n- unknown","reach":"local","title":"TeamViewer Patch Management for Windows: installer race lets low-privilege users run code as admin","impact":"high","summary":"A race condition during installation of TeamViewer Remote Management Patch Management for Windows, before version 26.9.1, lets a local user with low privileges replace the service executable in an insufficiently protected temporary directory. The attacker can then run arbitrary code with elevated privileges.","category":"other","nicknames":[],"who_cares":["windows","teamviewer","remote-management"],"confidence":0.7,"needs_auth":"yes","worst_case":"local attacker gains elevated privileges and runs arbitrary code","analyst_note":"Confirm the fixed version and whether a vendor advisory from TeamViewer lists detection steps; the NVD entry alone does not give checks.","how_to_check":"- Check the installed TeamViewer Remote Management Patch Management version on Windows machines and compare it to `26.9.1`\n- unknown","needs_analyst":true,"not_affected_if":["patch-management-not-installed"],"who_is_affected":"Windows machines where TeamViewer Remote Management Patch Management is installed or activated before version 26.9.1. Local users with low privileges are the threat, so systems with a single trusted user are at lower risk. The sources do not say which installer configurations are most exposed.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000603,"input_tokens":3324,"output_tokens":541,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-111584':19A,22A '-2026':18A,21A '26.9.1':44B,90C 'activ':120C 'admin':16A 'allow':91C 'arbitrari':67B,101C 'attack':63B,95C 'authent':94C 'code':14A,68B,102C 'condit':31B,74C 'cve':17A,20A 'directori':61B,116C 'elev':70B,104C 'execut':55B,100C,110C 'instal':6A,33B,77C 'insuffici':58B,113C 'let':8A,45B 'local':47B,93C 'low':10A,50B,97C 'low-privileg':9A 'manag':3A,26B,37B,39B,82C,84C,119C 'patch':2A,38B,83C,118C 'prior':87C 'privileg':11A,51B,71B,98C,105C 'process':78C 'protect':59B,114C 'race':7A,30B,73C 'remot':25B,36B,81C 'remote-manag':24B 'replac':52B,107C 'run':13A,66B 'servic':54B,109C 'teamview':1A,27B,35B,80C 'temporari':60B,115C 'user':12A,48B 'version':43B,89C 'window':5A,28B,41B,86C","nicknames":[],"mitigations":[],"who_affected":"Windows machines where TeamViewer Remote Management Patch Management is installed or activated before version 26.9.1. Local users with low privileges are the threat, so systems with a single trusted user are at lower risk. The sources do not say which installer configurations are most exposed.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T16:17:29+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","cvss_by":"psirt@teamviewer.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-111584","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111584","severity":null,"published_at":"2026-10-27T16:17:29+00:00","modified_at":"2026-10-27T16:17:29+00:00","first_seen_at":"2026-10-27T16:33:07+00:00","fetched_at":"2026-10-27T16:33:07+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"}