{"id":"CVE-2026-105518","kind":"vulnerability","aliases":["CVE-2026-105518"],"related":[],"title":"Windows iSCSI: use-after-free lets an unauthorized network attacker run code","description":"Use after free in Windows iSCSI allows an unauthorized attacker to execute code over a network.","summary":"A use-after-free bug in the Windows iSCSI component lets an attacker reach memory that has already been released. The NVD entry says an unauthorized attacker can execute code over a network.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","iscsi","self-hosted","windows"],"not_affected_if":[],"how_to_check":"- Check whether the iSCSI Initiator or iSCSI Target role is installed or running on the Windows machine (sources do not give a command).\n- Check the installed Windows update level against the vendor's security bulletin for CVE-2026-105518 (unknown from these sources).","fix":null,"status":"open","published_at":"2026-11-10T19:17:50+00:00","first_seen_at":"2026-11-10T19:24:17+00:00","triaged_at":"2026-11-10T19:34:07+00:00","updated_at":"2026-11-10T19:34:07+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T19:34:07Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Windows iSCSI: use-after-free lets an unauthorized network attacker run code","impact":"high","summary":"A use-after-free bug in the Windows iSCSI component lets an attacker reach memory that has already been released. The NVD entry says an unauthorized attacker can execute code over a network.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","iscsi","self-hosted"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Unauthorized network attacker executes code on the Windows machine.","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-105518 to confirm affected Windows builds, fixed updates and whether iSCSI must be enabled.","how_to_check":"- Check whether the iSCSI Initiator or iSCSI Target role is installed or running on the Windows machine (sources do not give a command).\n- Check the installed Windows update level against the vendor's security bulletin for CVE-2026-105518 (unknown from these sources).","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Windows machines that use the iSCSI component are the systems to look at, since it is reached over the network. Sources do not say which iSCSI configurations are exposed, so whether a given server is affected is unknown.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000707,"input_tokens":4478,"output_tokens":519,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Find the Microsoft security update guide entry for CVE-2026-105518 to confirm affected Windows builds, fixed updates and whether iSCSI must be enabled.","search":"'-105518':16A,19A '-2026':15A,18A 'allow':66C 'alreadi':44B 'attack':11A,39B,53B,69C 'bug':31B 'code':13A,56B,72C 'compon':36B 'cve':14A,17A 'entri':49B 'execut':55B,71C 'free':6A,30B,62C 'host':24B 'infrastructur':20B 'iscsi':2A,21B,35B,65C 'let':7A,37B 'memori':41B 'network':10A,59B,75C 'nvd':48B 'reach':40B 'releas':46B 'run':12A 'say':50B 'self':23B 'self-host':22B 'unauthor':9A,52B,68C 'use':4A,28B,60C 'use-after-fre':3A,27B 'window':1A,25B,34B,64C","nicknames":[],"mitigations":[],"who_affected":"Windows machines that use the iSCSI component are the systems to look at, since it is reached over the network. Sources do not say which iSCSI configurations are exposed, so whether a given server is affected is unknown.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","infrastructure","iscsi","selfhosted","windows"],"campaign_type":null,"search_a":"'-105518':16A,19A '-2026':15A,18A 'attack':11A 'code':13A 'cve':14A,17A 'free':6A 'iscsi':2A 'let':7A 'network':10A 'run':12A 'unauthor':9A 'use':4A 'use-after-fre':3A 'window':1A","search_b":"'alreadi':44B 'attack':39B,53B 'bug':31B 'code':56B 'compon':36B 'entri':49B 'execut':55B 'free':30B 'host':24B 'infrastructur':20B 'iscsi':21B,35B 'let':37B 'memori':41B 'network':59B 'nvd':48B 'reach':40B 'releas':46B 'say':50B 'self':23B 'self-host':22B 'unauthor':52B 'use':28B 'use-after-fre':27B 'window':25B,34B","search_c":"'allow':66C 'attack':69C 'code':72C 'execut':71C 'free':62C 'iscsi':65C 'network':75C 'unauthor':68C 'use':60C 'window':64C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:17:50+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-105518","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105518","severity":null,"published_at":"2026-11-10T19:17:50+00:00","modified_at":"2026-11-10T19:17:51+00:00","first_seen_at":"2026-11-10T19:24:17+00:00","fetched_at":"2026-11-10T19:24:17+00:00","note":null}],"documents":[],"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"}