{"id":"CVE-2026-86391","kind":"vulnerability","aliases":["CVE-2026-86391"],"related":[],"title":"Dell PowerProtect Data Domain Management Center: authentication bypass allows denial of service","description":"Dell PowerProtect Data Domain Management Center, Feature Release versions 7.7.1.0 through 8.8, LTS2024 release versions 7.13.1.0 through 7.13.1.80, LTS2025 release versions 8.3.1.0 through 8.3.1.40, LTS2026 release versions 8.6.1.0 through 8.6.1.20, contain an Authentication Bypass by Spoofing vulnerability. A low privileged attacker with remote access could potentially exploit this vulnerability, leading to Denial of service.","summary":"Dell PowerProtect Data Domain Management Center has an authentication bypass by spoofing in several release lines. A low-privileged remote attacker can potentially exploit it to cause a denial of service.","severity":"medium","cvss":6.4,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["backup-appliance","data-domain","dell","infrastructure","powerprotect"],"not_affected_if":["unaffected-version"],"how_to_check":"- Check the installed Data Domain Management Center version in the appliance UI or CLI against the affected ranges: Feature Release 7.7.1.0 through 8.8, LTS2024 7.13.1.0 through 7.13.1.80, LTS2025 8.3.1.0 through 8.3.1.40, LTS2026 8.6.1.0 through 8.6.1.20.","fix":"- Move to a fixed release from Dell's advisory for CVE-2026-86391; the sources do not name the fixed version numbers.","status":"open","published_at":"2026-10-28T10:17:10+00:00","first_seen_at":"2026-10-28T10:32:15+00:00","triaged_at":"2026-10-28T10:34:31+00:00","updated_at":"2026-10-28T10:34:31+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-28T10:34:31Z","model":"claude-haiku-5-5","output":{"fix":"- Move to a fixed release from Dell's advisory for CVE-2026-86391; the sources do not name the fixed version numbers.","reach":"network","title":"Dell PowerProtect Data Domain Management Center: authentication bypass allows denial of service","impact":"low","summary":"Dell PowerProtect Data Domain Management Center has an authentication bypass by spoofing in several release lines. A low-privileged remote attacker can potentially exploit it to cause a denial of service.","category":"infrastructure","nicknames":[],"who_cares":["dell","powerprotect","data-domain","backup-appliance"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker with low privileges causes the management service to become unavailable","analyst_note":"Find Dell's security advisory for CVE-2026-86391 to confirm fixed versions and whether remote access is required.","how_to_check":"- Check the installed Data Domain Management Center version in the appliance UI or CLI against the affected ranges: Feature Release 7.7.1.0 through 8.8, LTS2024 7.13.1.0 through 7.13.1.80, LTS2025 8.3.1.0 through 8.3.1.40, LTS2026 8.6.1.0 through 8.6.1.20.","needs_analyst":true,"not_affected_if":["unaffected-version"],"who_is_affected":"Teams running Dell PowerProtect Data Domain Management Center in the listed version ranges, reachable over the network by low-privileged accounts. Installations outside those ranges are not affected by this advisory.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000631,"input_tokens":3412,"output_tokens":580,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':14A,17A '-86391':15A,18A '7.13.1.0':75C '7.13.1.80':77C '7.7.1.0':69C '8.3.1.0':81C '8.3.1.40':83C '8.6.1.0':87C '8.6.1.20':89C '8.8':71C 'access':103C 'allow':9A 'applianc':21B 'attack':49B,100C 'authent':7A,36B,92C 'backup':20B 'backup-appli':19B 'bypass':8A,37B,93C 'caus':55B 'center':6A,33B,65C 'contain':90C 'could':104C 'cve':13A,16A 'data':3A,23B,30B,62C 'data-domain':22B 'dell':1A,25B,28B,60C 'denial':10A,57B,111C 'domain':4A,24B,31B,63C 'exploit':52B,106C 'featur':66C 'infrastructur':26B 'lead':109C 'line':43B 'low':46B,98C 'low-privileg':45B 'lts2024':72C 'lts2025':78C 'lts2026':84C 'manag':5A,32B,64C 'potenti':51B,105C 'powerprotect':2A,27B,29B,61C 'privileg':47B,99C 'releas':42B,67C,73C,79C,85C 'remot':48B,102C 'servic':12A,59B,113C 'sever':41B 'spoof':39B,95C 'version':68C,74C,80C,86C 'vulner':96C,108C","nicknames":[],"mitigations":[],"who_affected":"Teams running Dell PowerProtect Data Domain Management Center in the listed version ranges, reachable over the network by low-privileged accounts. Installations outside those ranges are not affected by this advisory.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-28T10:17:10+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L","cvss_by":"security_alert@emc.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-86391","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86391","severity":null,"published_at":"2026-10-28T10:17:10+00:00","modified_at":"2026-10-28T10:17:10+00:00","first_seen_at":"2026-10-28T10:32:15+00:00","fetched_at":"2026-10-28T10:32:15+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"}