{"id":"CVE-2026-95975","kind":"vulnerability","aliases":["CVE-2026-95975"],"related":[],"title":"Windows Performance Counters: heap overflow lets an attacker run code remotely","description":"Heap-based buffer overflow in Windows Performance Counters allows an unauthorized attacker to execute code over a network.","summary":"A heap-based buffer overflow in the Windows Performance Counters service lets an unauthorized attacker run code over the network. The sources give a CVSS score of 8.8 and do not say whether exploitation has been seen in the wild.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Windows Performance Counters","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["heap-overflow","infrastructure","performance-counters","rce","windows"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:21:54+00:00","first_seen_at":"2026-11-10T19:25:25+00:00","triaged_at":"2026-11-10T19:25:56+00:00","updated_at":"2026-11-10T20:15:35+00:00","category":"infrastructure","confidence":0.3,"triage":{"at":"2026-11-10T19:25:56Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Windows Performance Counters: heap overflow lets an attacker run code remotely","impact":"high","summary":"A heap-based buffer overflow in the Windows Performance Counters service lets an unauthorized attacker run code over the network. The sources give a CVSS score of 8.8 and do not say whether exploitation has been seen in the wild.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["windows","performance-counters"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker runs code on the Windows machine over the network","analyst_note":"Check the Microsoft Security Update Guide entry for affected Windows builds, the fixed update and any mitigation for CVE-2026-95975.","how_to_check":"- unknown","plain_action":"","product_name":"Windows Performance Counters","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Any Windows machine running the Performance Counters service is potentially exposed. The sources do not say which Windows versions or configurations are affected, so unknown.","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000672,"input_tokens":4494,"output_tokens":445,"severity_before":"high"},"analyst_status":"done","analyst_note":"Check the Microsoft Security Update Guide entry for affected Windows builds, the fixed update and any mitigation for CVE-2026-95975.","search":"'-2026':13A,16A '-95975':14A,17A '8.8':58B 'allow':80C 'attack':8A,45B,83C 'base':33B,73C 'buffer':34B,74C 'code':10A,47B,86C 'counter':3A,27B,40B,79C 'counters':20A 'cve':12A,15A 'cvss':55B 'execut':85C 'exploit':64B 'give':53B 'heap':4A,22B,32B,72C 'heap-bas':31B,71C 'heap-overflow':21B 'infrastructur':24B 'let':6A,42B 'network':50B,89C 'overflow':5A,23B,35B,75C 'perform':2A,26B,39B,78C 'performance':19A 'performance-count':25B 'rce':28B 'remot':11A 'run':9A,46B 'say':62B 'score':56B 'seen':67B 'servic':41B 'sourc':52B 'unauthor':44B,82C 'whether':63B 'wild':70B 'window':1A,29B,38B,77C 'windows':18A","nicknames":[],"mitigations":[],"who_affected":"Any Windows machine running the Performance Counters service is potentially exposed. The sources do not say which Windows versions or configurations are affected, so unknown.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":["performancecounters","windowsperformancecounters"],"ptokens":["counters","performance","windows"],"labels":["heapoverflow","high","infrastructure","performancecounters","rce","vendor","windows"],"campaign_type":null,"search_a":"'-2026':13A,16A '-95975':14A,17A 'attack':8A 'code':10A 'counter':3A 'counters':20A 'cve':12A,15A 'heap':4A 'let':6A 'overflow':5A 'perform':2A 'performance':19A 'remot':11A 'run':9A 'window':1A 'windows':18A","search_b":"'8.8':58B 'attack':45B 'base':33B 'buffer':34B 'code':47B 'counter':27B,40B 'cvss':55B 'exploit':64B 'give':53B 'heap':22B,32B 'heap-bas':31B 'heap-overflow':21B 'infrastructur':24B 'let':42B 'network':50B 'overflow':23B,35B 'perform':26B,39B 'performance-count':25B 'rce':28B 'run':46B 'say':62B 'score':56B 'seen':67B 'servic':41B 'sourc':52B 'unauthor':44B 'whether':63B 'wild':70B 'window':29B,38B","search_c":"'allow':80C 'attack':83C 'base':73C 'buffer':74C 'code':86C 'counter':79C 'execut':85C 'heap':72C 'heap-bas':71C 'network':89C 'overflow':75C 'perform':78C 'unauthor':82C 'window':77C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:21:54+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-2026-95975","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-95975","severity":null,"published_at":"2026-11-10T19:21:54+00:00","modified_at":"2026-11-10T19:21:54+00:00","first_seen_at":"2026-11-10T19:25:25+00:00","fetched_at":"2026-11-10T19:25:25+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-95975:2631","url":null,"severity":null,"published_at":"2026-11-10T20:15:35+00:00","modified_at":"2026-11-10T20:15:35+00:00","first_seen_at":"2026-11-10T20:15:35+00:00","fetched_at":"2026-11-10T20:15:35+00:00","note":"Could not read MSRC or NVD pages (both returned empty); only a third-party listing (NextGuard) confirms the title, CVSS 8.8 and a Nov 9 2026 date. No affected builds, KB, fix or exploitation status found. Nothing verified. Revisit when the MSRC entry is readable: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-95975"}],"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"}