{"id":"CVE-2026-113860","kind":"vulnerability","aliases":["CVE-2026-113860"],"related":[],"title":"Windows Hyper-V: use-after-free lets a local user gain higher privileges","description":"Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.","summary":"A use-after-free bug in Windows Hyper-V lets an attacker who already has an account on the machine raise their privileges. The attacker gets the rights of a more powerful local user, which can mean full control of the host.","severity":"high","cvss":7.0,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["hyper-v","infrastructure","local","privilege-escalation","windows","windows-server"],"not_affected_if":["hyper-v-not-enabled"],"how_to_check":"Check whether the November 2026 (10 Nov) Windows cumulative update is installed on Hyper-V hosts (Get-HotFix, or winver build). Exact affected builds and KB per product: unknown until the MSRC entry for CVE-2026-113860 is read.","fix":"Install the November 2026 Windows security update for your Windows version (released 2026-11-10). Exact KB/build for this CVE: unknown, see MSRC Update Guide.","status":"open","published_at":"2026-11-10T19:19:06+00:00","first_seen_at":"2026-11-10T19:24:42+00:00","triaged_at":"2026-11-10T19:52:10+00:00","updated_at":"2026-11-10T23:48:06+00:00","category":"infrastructure","confidence":0.4,"triage":{"at":"2026-11-10T19:52:10Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Windows Hyper-V: use-after-free lets a local user gain higher privileges","impact":"high","summary":"A use-after-free bug in Windows Hyper-V lets an attacker who already has an account on the machine raise their privileges. The attacker gets the rights of a more powerful local user, which can mean full control of the host.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","hyper-v"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains elevated privileges on the Windows host","analyst_note":"Find the affected Windows builds and Microsoft's patch in the MSRC advisory for CVE-2026-113860; the NVD entry alone gives no versions.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["hyper-v-not-enabled"],"who_is_affected":"Machines running Windows with the Hyper-V role enabled are the systems in scope. An attacker needs a local logon first, so shared hosts and systems with many users carry more risk. unknown whether a specific Windows build or configuration is exposed.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"yes","severity_if_unknown":"high"},"cost_usd":0.000683,"input_tokens":4480,"output_tokens":470,"severity_before":"high"},"analyst_status":"done","analyst_note":"Find the affected Windows builds and Microsoft's patch in the MSRC advisory for CVE-2026-113860; the NVD entry alone gives no versions.","search":"'-113860':18A,21A '-2026':17A,20A 'account':52B 'allow':86C 'alreadi':49B 'attack':47B,60B,89C 'author':88C 'bug':39B 'control':74B 'cve':16A,19A 'elev':91C 'escal':29B 'free':8A,38B,80C 'full':73B 'gain':13A 'get':61B 'higher':14A 'host':77B 'hyper':3A,23B,43B,84C 'hyper-v':2A,22B,42B,83C 'infrastructur':25B 'let':9A,45B 'local':11A,26B,68B,93C 'machin':55B 'mean':72B 'power':67B 'privileg':15A,28B,58B,92C 'privilege-escal':27B 'rais':56B 'right':63B 'server':33B 'use':6A,36B,78C 'use-after-fre':5A,35B 'user':12A,69B 'v':4A,24B,44B,85C 'window':1A,30B,32B,41B,82C 'windows-serv':31B","nicknames":[],"mitigations":[],"who_affected":"Machines running Windows with the Hyper-V role enabled are the systems in scope. An attacker needs a local logon first, so shared hosts and systems with many users carry more risk. unknown whether a specific Windows build or configuration is exposed.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","hyperv","infrastructure","local","privilegeescalation","windows","windowsserver"],"campaign_type":null,"search_a":"'-113860':18A,21A '-2026':17A,20A 'cve':16A,19A 'free':8A 'gain':13A 'higher':14A 'hyper':3A 'hyper-v':2A 'let':9A 'local':11A 'privileg':15A 'use':6A 'use-after-fre':5A 'user':12A 'v':4A 'window':1A","search_b":"'account':52B 'alreadi':49B 'attack':47B,60B 'bug':39B 'control':74B 'escal':29B 'free':38B 'full':73B 'get':61B 'host':77B 'hyper':23B,43B 'hyper-v':22B,42B 'infrastructur':25B 'let':45B 'local':26B,68B 'machin':55B 'mean':72B 'power':67B 'privileg':28B,58B 'privilege-escal':27B 'rais':56B 'right':63B 'server':33B 'use':36B 'use-after-fre':35B 'user':69B 'v':24B,44B 'window':30B,32B,41B 'windows-serv':31B","search_c":"'allow':86C 'attack':89C 'author':88C 'elev':91C 'free':80C 'hyper':84C 'hyper-v':83C 'local':93C 'privileg':92C 'use':78C 'v':85C 'window':82C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:19:06+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:H/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-2026-113860","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113860","severity":null,"published_at":"2026-11-10T19:19:06+00:00","modified_at":"2026-11-10T19:19:06+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-2026-113860:3234","url":"https://beyondmachines.net/event_details/microsoft-patches-1235-flaws-in-november-2026-update-including-actively-exploited-outlook-flaw-a-y-v-q-f","severity":null,"published_at":"2026-11-10T23:48:06+00:00","modified_at":"2026-11-10T23:48:06+00:00","first_seen_at":"2026-11-10T23:48:06+00:00","fetched_at":"2026-11-10T23:48:06+00:00","note":"Could not read MSRC page (JS-only, empty via web-cli). Only secondary source (beyondmachines) confirms: fixed in Nov 10 2026 Patch Tuesday, Hyper-V EoP, rated critical by that source, no exploitation reported. No per-CVE builds/KB found; nothing verified. Settle with MSRC Update Guide entry for the KB-per-product table.","cites":["https://beyondmachines.net/event_details/microsoft-patches-1235-flaws-in-november-2026-update-including-actively-exploited-outlook-flaw-a-y-v-q-f"]}],"documents":[{"id":120454,"url":"https://beyondmachines.net/event_details/microsoft-patches-1235-flaws-in-november-2026-update-including-actively-exploited-outlook-flaw-a-y-v-q-f","title":"Microsoft Patches 1,235 Flaws in November 2026 Update (BeyondMachines)","kind":"blog","source":"analyst","publisher":null,"text":null,"published_at":null,"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"}