{"id":"CVE-2026-113843","kind":"vulnerability","aliases":["CVE-2026-113843"],"related":[],"title":"Windows: Remote Access Connection Manager lets a local user gain higher privileges","description":"Improper authentication in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.","summary":"Windows Remote Access Connection Manager has an improper authentication flaw. An attacker who already has a local account can elevate privileges on the machine.","severity":"high","cvss":7.8,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Windows 10","fixed":["10.0.14393.9688","10.0.17763.9487","10.0.19044.7846","10.0.19045.7846"],"affected":"1607 < 10.0.14393.9688; 1809 < 10.0.17763.9487; 21H2 < 10.0.19044.7846; 22H2 < 10.0.19045.7846","ecosystem":"vendor"},{"name":"Windows 11","fixed":["10.0.22631.7711","10.0.26100.9974","10.0.26200.9974","10.0.28000.3501","10.0.26300.9974"],"affected":"23H2 < 10.0.22631.7711; 24H2 < 10.0.26100.9974; 25H2 < 10.0.26200.9974; 26H1 < 10.0.28000.3501; 26H2 < 10.0.26300.9974","ecosystem":"vendor"},{"name":"Windows Server","fixed":["10.0.14393.9688","10.0.17763.9487","10.0.20348.5870","10.0.26100.33822"],"affected":"2016 < 10.0.14393.9688; 2019 < 10.0.17763.9487; 2022 < 10.0.20348.5870; 2025 < 10.0.26100.33822","ecosystem":"vendor"}],"ecosystems":[],"tags":["infrastructure","local","privilege-escalation","windows"],"not_affected_if":["patched-nov-2026"],"how_to_check":"Run winver or [System.Environment]::OSVersion / (Get-ComputerInfo).OsBuildRevision and compare the full build with the fixed build for your edition (e.g. Windows 11 24H2 needs 10.0.26100.9974 or later; Windows 10 22H2 needs 10.0.19045.7846 or later). Any build below the fixed one is exposed.","fix":"Install the 10 Nov 2026 Patch Tuesday cumulative update. Fixed builds: Win10 1607/Server 2016 10.0.14393.9688; Win10 1809/Server 2019 10.0.17763.9487; Win10 21H2 10.0.19044.7846; Win10 22H2 10.0.19045.7846 (KB5131096 per BleepingComputer); Server 2022 10.0.20348.5870; Win11 23H2 10.0.22631.7711; Win11 24H2/25H2/26H2 10.0.26100.9974 / 10.0.26200.9974 / 10.0.26300.9974; Win11 26H1 10.0.28000.3501; Server 2025 10.0.26100.33822.","status":"open","published_at":"2026-11-10T19:19:05+00:00","first_seen_at":"2026-11-10T19:24:42+00:00","triaged_at":"2026-11-10T19:40:57+00:00","updated_at":"2026-11-10T23:49:20+00:00","category":"infrastructure","confidence":0.75,"triage":{"at":"2026-11-10T19:40:57Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows: Remote Access Connection Manager lets a local user gain higher privileges","impact":"high","summary":"Windows Remote Access Connection Manager has an improper authentication flaw. An attacker who already has a local account can elevate privileges on the machine.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"Local attacker gains elevated system privileges on the Windows machine","analyst_note":"Find the Microsoft advisory for CVE-2026-113843 to confirm affected Windows builds and the patch.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Affects Windows machines running the Remote Access Connection Manager service; the attacker needs a valid local account first. The sources do not say which Windows builds or configurations are exposed.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000641,"input_tokens":4490,"output_tokens":384,"severity_before":"high"},"analyst_status":"done","analyst_note":"Find the Microsoft advisory for CVE-2026-113843 to confirm affected Windows builds and the patch.","search":"'-113843':15A,18A '-2026':14A,17A '10':20A '11':22A 'access':3A,33B,60C 'account':48B 'allow':63C 'alreadi':44B 'attack':42B,66C 'authent':39B,56C 'author':65C 'connect':4A,34B,61C 'cve':13A,16A 'elev':50B,68C 'escal':29B 'flaw':40B 'gain':10A 'higher':11A 'improp':38B,55C 'infrastructur':25B 'let':6A 'local':8A,26B,47B,70C 'machin':54B 'manag':5A,35B,62C 'privileg':12A,28B,51B,69C 'privilege-escal':27B 'remot':2A,32B,59C 'server':24A 'user':9A 'window':1A,30B,31B,58C 'windows':19A,21A,23A","nicknames":[],"mitigations":[],"who_affected":"Any Windows 10, Windows 11 or Windows Server 2016-2025 machine on a build older than the November 2026 update is listed as affected by Microsoft's record. The attacker needs a local low-privilege account first, so shared machines, terminal/RDP servers and developer or CI Windows hosts matter most; single-user machines with trusted users are lower priority.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":["10","11","server","windows10","windows11","windowsserver"],"ptokens":["10","11","server","windows"],"labels":["high","infrastructure","local","privilegeescalation","windows"],"campaign_type":null,"search_a":"'-113843':15A,18A '-2026':14A,17A '10':20A '11':22A 'access':3A 'connect':4A 'cve':13A,16A 'gain':10A 'higher':11A 'let':6A 'local':8A 'manag':5A 'privileg':12A 'remot':2A 'server':24A 'user':9A 'window':1A 'windows':19A,21A,23A","search_b":"'access':33B 'account':48B 'alreadi':44B 'attack':42B 'authent':39B 'connect':34B 'elev':50B 'escal':29B 'flaw':40B 'improp':38B 'infrastructur':25B 'local':26B,47B 'machin':54B 'manag':35B 'privileg':28B,51B 'privilege-escal':27B 'remot':32B 'window':30B,31B","search_c":"'access':60C 'allow':63C 'attack':66C 'authent':56C 'author':65C 'connect':61C 'elev':68C 'improp':55C 'local':70C 'manag':62C 'privileg':69C 'remot':59C 'window':58C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:19:05+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-113843","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113843","severity":null,"published_at":"2026-11-10T19:19:05+00:00","modified_at":"2026-11-10T19:19:05+00:00","first_seen_at":"2026-11-10T19:24:42+00:00","fetched_at":"2026-11-10T19:24:42+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-113843:3240","url":"https://nvd.nist.gov/vuln/detail/cve-2026-113843","severity":null,"published_at":"2026-11-10T23:49:20+00:00","modified_at":"2026-11-10T23:49:20+00:00","first_seen_at":"2026-11-10T23:49:20+00:00","fetched_at":"2026-11-10T23:49:20+00:00","note":"Could not render MSRC page (JS-only); affected/fixed builds taken from Microsoft CNA record shown on NVD, so nothing marked verified. No exploitation reported (not in KEV, Senserva lists no).","cites":["https://nvd.nist.gov/vuln/detail/cve-2026-113843"]}],"documents":[{"id":120461,"url":"https://nvd.nist.gov/vuln/detail/cve-2026-113843","title":"NVD CVE-2026-113843 (Microsoft CNA affected builds)","kind":"advisory","source":"analyst","publisher":null,"text":null,"published_at":null,"relation":"advisory","confidence":null,"note":null},{"id":117830,"url":"https://www.bleepingcomputer.com/news/microsoft/microsoft-releases-windows-10-kb5131096-extended-security-update/","title":"Windows 10 KB5131096 ESU (Nov 2026 Patch Tuesday)","kind":"blog","source":"blog","publisher":null,"text":"Microsoft releases Windows 10 KB5131096 extended security update\n\nMicrosoft released the Windows 10 KB5131096 extended security update, which includes this month's November 2026 Patch Tuesday fixes and a few bug fixes and changes. [...]","published_at":"2026-11-10T20:04:36+00:00","relation":"mentions","confidence":null,"note":null}],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}