{"id":"CVE-2026-55716","kind":"vulnerability","aliases":["CVE-2026-55716"],"related":[],"title":"Intel server boards: UEFI VGA check can leak memory contents","description":"Out-of-bounds read in the CheckUefiVgaMode for the Intel(R) Server Board D50DNP and Intel(R) Server Board M50FCP within Ring 0 UEFI may allow an information disclosure. Startup code and smm adversary with a privileged user combined with a high complexity attack may enable data exposure. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.","summary":"A out-of-bounds read in the UEFI firmware routine CheckUefiVgaMode on Intel Server Board D50DNP and M50FCP can expose data from firmware memory. An attacker with privileged local access and a high-complexity setup could read sensitive data.","severity":"medium","cvss":5.6,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["bios","d50dnp","infrastructure","intel-server-board","m50fcp","uefi-firmware"],"not_affected_if":["no-local-privileged-access","other-intel-boards"],"how_to_check":"- Identify the board model with `dmidecode -s baseboard-product-name` on the server\n- Compare the BIOS/UEFI version against Intel's advisory for D50DNP and M50FCP boards","fix":null,"status":"open","published_at":"2026-11-10T18:17:41+00:00","first_seen_at":"2026-11-10T18:22:58+00:00","triaged_at":"2026-11-10T18:25:12+00:00","updated_at":"2026-11-10T18:25:12+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-10T18:25:12Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Intel server boards: UEFI VGA check can leak memory contents","impact":"low","summary":"A out-of-bounds read in the UEFI firmware routine CheckUefiVgaMode on Intel Server Board D50DNP and M50FCP can expose data from firmware memory. An attacker with privileged local access and a high-complexity setup could read sensitive data.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["intel-server-board","d50dnp","m50fcp","uefi-firmware","bios"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"Firmware memory contents readable by a privileged local attacker","analyst_note":"Find Intel's security advisory and the firmware version that fixes D50DNP and M50FCP boards via the NVD link.","how_to_check":"- Identify the board model with `dmidecode -s baseboard-product-name` on the server\n- Compare the BIOS/UEFI version against Intel's advisory for D50DNP and M50FCP boards\n- unknown for other checks: the sources do not say","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["other-intel-boards","no-local-privileged-access"],"who_is_affected":"Only Intel Server Board D50DNP and M50FCP systems running the affected UEFI firmware are in scope. Exploitation needs local privileged access, startup or SMM code, and high-complexity conditions, so the risk is limited on well-administered servers. The sources do not list fixed firmware versions.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"yes","severity_if_unknown":"unknown"},"cost_usd":0.000772,"input_tokens":4692,"output_tokens":605,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-55716':13A,16A '0':92C 'access':58B,125C 'adversari':103C 'allow':95C 'attack':54B,113C,127C 'avail':151C,166C 'bio':17B 'board':3A,23B,43B,82C,88C 'bound':32B,72C 'check':6A 'checkuefivgamod':39B,76C 'code':100C 'combin':108C 'complex':63B,112C 'confidenti':146C,161C 'content':10A 'could':65B 'cve':11A,14A 'd50dnp':18B,44B,83C 'data':49B,68B,116C 'disclosur':98C 'enabl':115C 'expos':48B 'exposur':117C 'firmwar':27B,37B,51B 'high':62B,111C,147C 'high-complex':61B 'impact':144C,168C 'inform':97C 'infrastructur':19B 'integr':148C,163C 'intel':1A,21B,41B,79C,85C 'intel-server-board':20B 'interact':139C 'intern':133C 'knowledg':134C 'leak':8A 'local':57B,124C 'm50fcp':24B,46B,89C 'may':94C,114C,120C,143C 'memori':9A,52B 'none':149C,152C,162C,164C,167C 'occur':122C 'out-of-bound':29B,69C 'potenti':121C,141C 'present':130C 'privileg':56B,106C 'r':80C,86C 'read':33B,66B,73C 'requir':128C,136C 'result':119C,157C 'ring':91C 'routin':38B 'sensit':67B 'server':2A,22B,42B,81C,87C 'setup':64B 'smm':102C 'special':132C 'startup':99C 'subsequ':159C 'system':156C,160C 'uefi':4A,26B,36B,93C 'uefi-firmwar':25B 'user':107C,138C 'vga':5A 'via':123C 'vulner':142C,155C 'within':90C 'without':131C","nicknames":[],"mitigations":[],"who_affected":"Only Intel Server Board D50DNP and M50FCP systems running the affected UEFI firmware are in scope. Exploitation needs local privileged access, startup or SMM code, and high-complexity conditions, so the risk is limited on well-administered servers. The sources do not list fixed firmware versions.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["bios","d50dnp","infrastructure","intelserverboard","m50fcp","medium","uefifirmware"],"campaign_type":null,"search_a":"'-2026':12A,15A '-55716':13A,16A 'board':3A 'check':6A 'content':10A 'cve':11A,14A 'intel':1A 'leak':8A 'memori':9A 'server':2A 'uefi':4A 'vga':5A","search_b":"'access':58B 'attack':54B 'bio':17B 'board':23B,43B 'bound':32B 'checkuefivgamod':39B 'complex':63B 'could':65B 'd50dnp':18B,44B 'data':49B,68B 'expos':48B 'firmwar':27B,37B,51B 'high':62B 'high-complex':61B 'infrastructur':19B 'intel':21B,41B 'intel-server-board':20B 'local':57B 'm50fcp':24B,46B 'memori':52B 'out-of-bound':29B 'privileg':56B 'read':33B,66B 'routin':38B 'sensit':67B 'server':22B,42B 'setup':64B 'uefi':26B,36B 'uefi-firmwar':25B","search_c":"'0':92C 'access':125C 'adversari':103C 'allow':95C 'attack':113C,127C 'avail':151C,166C 'board':82C,88C 'bound':72C 'checkuefivgamod':76C 'code':100C 'combin':108C 'complex':112C 'confidenti':146C,161C 'd50dnp':83C 'data':116C 'disclosur':98C 'enabl':115C 'exposur':117C 'high':111C,147C 'impact':144C,168C 'inform':97C 'integr':148C,163C 'intel':79C,85C 'interact':139C 'intern':133C 'knowledg':134C 'local':124C 'm50fcp':89C 'may':94C,114C,120C,143C 'none':149C,152C,162C,164C,167C 'occur':122C 'out-of-bound':69C 'potenti':121C,141C 'present':130C 'privileg':106C 'r':80C,86C 'read':73C 'requir':128C,136C 'result':119C,157C 'ring':91C 'server':81C,87C 'smm':102C 'special':132C 'startup':99C 'subsequ':159C 'system':156C,160C 'uefi':93C 'user':107C,138C 'via':123C 'vulner':142C,155C 'within':90C 'without':131C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T18:17:41+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/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":"secure@intel.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-55716","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55716","severity":null,"published_at":"2026-11-10T18:17:41+00:00","modified_at":"2026-11-10T18:17:41+00:00","first_seen_at":"2026-11-10T18:22:58+00:00","fetched_at":"2026-11-10T18:22:58+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"}