{"id":"CVE-2026-125883","kind":"vulnerability","aliases":["CVE-2026-125883"],"related":[],"title":"N-able N-central: XML entity flaw allows XML schema poisoning attacks","description":"Improper restriction of XML external entity reference vulnerability in N-able N-central allows XML Schema Poisoning.\n\nThis issue affects N-central: before 26.4.1.","summary":"N-able N-central has an XML external entity flaw that lets crafted XML reference outside resources during processing. The sources do not say what an attacker can read or run from there.","severity":"critical","cvss":9.3,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"N-central","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["msp","n-central","rmm","vendor"],"not_affected_if":["version-26.4.1-or-later"],"how_to_check":"- Check the installed N-central version in the product's admin console or about page; the sources do not name a UI path.","fix":"- N-central: upgrade to `26.4.1` or later (the sources say versions before `26.4.1` are affected)","status":"open","published_at":"2026-11-10T22:18:31+00:00","first_seen_at":"2026-11-10T22:27:29+00:00","triaged_at":"2026-11-10T22:28:46+00:00","updated_at":"2026-11-10T22:28:46+00:00","category":"vendor","confidence":0.5,"triage":{"at":"2026-11-10T22:28:46Z","model":"claude-haiku-5-5","output":{"fix":"- N-central: upgrade to `26.4.1` or later (the sources say versions before `26.4.1` are affected)","reach":"unknown","title":"N-able N-central: XML entity flaw allows XML schema poisoning attacks","impact":"high","summary":"N-able N-central has an XML external entity flaw that lets crafted XML reference outside resources during processing. The sources do not say what an attacker can read or run from there.","audience":"businesses","category":"vendor","nicknames":[],"who_cares":["n-central","msp","rmm"],"confidence":0.5,"fix_status":"available","needs_auth":"unknown","worst_case":"unknown; sources describe only XML schema poisoning via external entities","analyst_note":"Confirm the attack path, required access and impact in the NVD entry or N-able's advisory for CVE-2026-125883.","how_to_check":"- Check the installed N-central version in the product's admin console or about page; the sources do not name a UI path.\n- unknown for any further check","plain_action":"","product_name":"N-central","needs_analyst":true,"not_affected_if":["version-26.4.1-or-later"],"who_is_affected":"Any organisation running N-central versions before 26.4.1 is affected. The sources do not describe the exact data path or configuration that makes an instance reachable, so whether internet-facing deployments are at higher risk is unknown.","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000713,"input_tokens":4511,"output_tokens":523,"severity_before":"critical"},"analyst_status":null,"analyst_note":null,"search":"'-125883':17A,20A '-2026':16A,19A '26.4.1':89C 'abl':3A,32B,74C 'affect':84C 'allow':10A,78C 'attack':14A,58B 'central':6A,23A,27B,35B,77C,87C 'craft':44B 'cve':15A,18A 'entiti':8A,40B,68C 'extern':39B,67C 'flaw':9A,41B 'improp':63C 'issu':83C 'let':43B 'msp':24B 'n':2A,5A,22A,26B,31B,34B,73C,76C,86C 'n-abl':1A,30B,72C 'n-central':4A,21A,25B,33B,75C,85C 'outsid':47B 'poison':13A,81C 'process':50B 'read':60B 'refer':46B,69C 'resourc':48B 'restrict':64C 'rmm':28B 'run':62B 'say':55B 'schema':12A,80C 'sourc':52B 'vendor':29B 'vulner':70C 'xml':7A,11A,38B,45B,66C,79C","nicknames":[],"mitigations":[],"who_affected":"Any organisation running N-central versions before 26.4.1 is affected. The sources do not describe the exact data path or configuration that makes an instance reachable, so whether internet-facing deployments are at higher risk is unknown.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":["ncentral"],"ptokens":["central"],"labels":["critical","msp","ncentral","rmm","vendor"],"campaign_type":null,"search_a":"'-125883':17A,20A '-2026':16A,19A 'abl':3A 'allow':10A 'attack':14A 'central':6A,23A 'cve':15A,18A 'entiti':8A 'flaw':9A 'n':2A,5A,22A 'n-abl':1A 'n-central':4A,21A 'poison':13A 'schema':12A 'xml':7A,11A","search_b":"'abl':32B 'attack':58B 'central':27B,35B 'craft':44B 'entiti':40B 'extern':39B 'flaw':41B 'let':43B 'msp':24B 'n':26B,31B,34B 'n-abl':30B 'n-central':25B,33B 'outsid':47B 'process':50B 'read':60B 'refer':46B 'resourc':48B 'rmm':28B 'run':62B 'say':55B 'sourc':52B 'vendor':29B 'xml':38B,45B","search_c":"'26.4.1':89C 'abl':74C 'affect':84C 'allow':78C 'central':77C,87C 'entiti':68C 'extern':67C 'improp':63C 'issu':83C 'n':73C,76C,86C 'n-abl':72C 'n-central':75C,85C 'poison':81C 'refer':69C 'restrict':64C 'schema':80C 'vulner':70C 'xml':66C,79C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T22:18:31+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"a5532a13-c4dd-4202-bef1-e0b8f2f8d12b","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-125883","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-125883","severity":null,"published_at":"2026-11-10T22:18:31+00:00","modified_at":"2026-11-10T22:18:31+00:00","first_seen_at":"2026-11-10T22:27:29+00:00","fetched_at":"2026-11-10T22:27:29+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"}