{"id":"CVE-2026-87103","kind":"vulnerability","aliases":["CVE-2026-87103"],"related":[],"title":"Acronis Cyber Protect 17: improper token validation exposes sensitive data","description":"Sensitive information disclosure and manipulation due to improper token validation. The following products are affected: Acronis Cyber Protect 17 (Linux, Windows) before build 42587.","summary":"Acronis Cyber Protect 17 builds before 42587 do not validate tokens properly, per the NVD entry. An attacker can read sensitive information and manipulate data through this flaw.","severity":"high","cvss":7.4,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["acronis-cyber-protect","backup","linux","other","windows"],"not_affected_if":[],"how_to_check":"- Check the installed Acronis Cyber Protect 17 build number in the product console or agent about page.\n- unknown for any other check; the sources do not say.","fix":"- Upgrade Acronis Cyber Protect 17 to build `42587` or later.\n- unknown for any other action; the sources do not say.","status":"open","published_at":"2026-10-28T11:17:27+00:00","first_seen_at":"2026-10-28T11:32:34+00:00","triaged_at":"2026-10-28T11:33:23+00:00","updated_at":"2026-10-28T11:33:23+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-10-28T11:33:23Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade Acronis Cyber Protect 17 to build `42587` or later.\n- unknown for any other action; the sources do not say.","reach":"unknown","title":"Acronis Cyber Protect 17: improper token validation exposes sensitive data","impact":"medium","summary":"Acronis Cyber Protect 17 builds before 42587 do not validate tokens properly, per the NVD entry. An attacker can read sensitive information and manipulate data through this flaw.","category":"other","nicknames":[],"who_cares":["acronis-cyber-protect","windows","linux","backup"],"confidence":0.5,"needs_auth":"unknown","worst_case":"Attacker reads sensitive information and manipulates data","analyst_note":"Check the NVD entry and Acronis advisory for attack vector, auth requirement and exact token flaw; the sources give only a one-line description.","how_to_check":"- Check the installed Acronis Cyber Protect 17 build number in the product console or agent about page.\n- unknown for any other check; the sources do not say.","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Teams running Acronis Cyber Protect 17 on Linux or Windows with a build older than 42587. The sources do not say which deployment or configuration makes the flaw reachable, so unknown whether managed or default setups are exposed.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000581,"input_tokens":3260,"output_tokens":509,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-87103':13A,16A '17':4A,28B,71C '42587':31B,76C 'acroni':1A,18B,25B,68C 'acronis-cyber-protect':17B 'affect':67C 'attack':42B 'backup':21B 'build':29B,75C 'cve':11A,14A 'cyber':2A,19B,26B,69C 'data':10A,49B 'disclosur':55C 'due':58C 'entri':40B 'expos':8A 'flaw':52B 'follow':64C 'improp':5A,60C 'inform':46B,54C 'linux':22B,72C 'manipul':48B,57C 'nvd':39B 'per':37B 'product':65C 'proper':36B 'protect':3A,20B,27B,70C 'read':44B 'sensit':9A,45B,53C 'token':6A,35B,61C 'valid':7A,34B,62C 'window':24B,73C","nicknames":[],"mitigations":[],"who_affected":"Teams running Acronis Cyber Protect 17 on Linux or Windows with a build older than 42587. The sources do not say which deployment or configuration makes the flaw reachable, so unknown whether managed or default setups are exposed.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-28T11:17:27+00:00","kev":null,"cvss_vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","cvss_by":"security@acronis.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-87103","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87103","severity":null,"published_at":"2026-10-28T11:17:27+00:00","modified_at":"2026-10-28T11:17:27+00:00","first_seen_at":"2026-10-28T11:32:34+00:00","fetched_at":"2026-10-28T11:32:34+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}