{"id":"CVE-2026-115678","kind":"vulnerability","aliases":["CVE-2026-115678"],"related":[],"title":"Arm Keil MDK-Middleware: SNMP processing reads memory out of bounds before login","description":"Arm Keil MDK-Middleware 8.0.0-8.3.0 may allow pre-authentication out-of-bounds read in SNMP processing","summary":"Arm Keil MDK-Middleware versions 8.0.0 through 8.3.0 may read memory past the end of a buffer while handling SNMP packets. The read happens before any authentication, so a remote sender could potentially leak memory contents.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["arm-keil","embedded","firmware","mdk-middleware","package","snmp"],"not_affected_if":["other-middleware-version","snmp-not-used"],"how_to_check":"- Check the MDK-Middleware version in the project's pack files or Keil pack manager, e.g. look for `8.0.0` to `8.3.0` in the installed Arm.Keil pack version\n- Check whether the SNMP component of MDK-Middleware is included in firmware builds","fix":"- Move MDK-Middleware to a version newer than `8.3.0` once Arm publishes a fixed release (unknown from sources)\n- Disable or remove the SNMP component if it is not needed","status":"open","published_at":"2026-10-26T16:17:17+00:00","first_seen_at":"2026-10-26T16:31:01+00:00","triaged_at":"2026-10-26T16:33:13+00:00","updated_at":"2026-10-26T16:33:13+00:00","category":"package","confidence":0.4,"triage":{"at":"2026-10-26T16:33:13Z","model":"claude-haiku-5-5","output":{"fix":"- Move MDK-Middleware to a version newer than `8.3.0` once Arm publishes a fixed release (unknown from sources)\n- Disable or remove the SNMP component if it is not needed","reach":"network","title":"Arm Keil MDK-Middleware: SNMP processing reads memory out of bounds before login","impact":"low","summary":"Arm Keil MDK-Middleware versions 8.0.0 through 8.3.0 may read memory past the end of a buffer while handling SNMP packets. The read happens before any authentication, so a remote sender could potentially leak memory contents.","category":"package","nicknames":[],"who_cares":["embedded","arm-keil","mdk-middleware","snmp","firmware"],"confidence":0.4,"needs_auth":"no","worst_case":"Device memory contents may leak to a remote sender","analyst_note":"Check the NVD entry and Arm security advisories for the fixed MDK-Middleware version and whether the SNMP component is enabled by default.","how_to_check":"- Check the MDK-Middleware version in the project's pack files or Keil pack manager, e.g. look for `8.0.0` to `8.3.0` in the installed Arm.Keil pack version\n- Check whether the SNMP component of MDK-Middleware is included in firmware builds","needs_analyst":true,"not_affected_if":["snmp-not-used","other-middleware-version"],"who_is_affected":"Embedded firmware teams that build with Arm Keil MDK-Middleware 8.0.0 to 8.3.0 and ship the SNMP networking component on a device reachable over the network. Teams without SNMP enabled, or using other middleware versions, can skip it.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"unknown"},"cost_usd":0.000636,"input_tokens":3274,"output_tokens":618,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-115678':17A,20A '-2026':16A,19A '8.0.0':37B,73C '8.3.0':39B,74C 'allow':76C 'arm':1A,22B,31B,68C 'arm-keil':21B 'authent':58B,79C 'bound':12A,83C 'buffer':48B 'content':67B 'could':63B 'cve':15A,18A 'embed':24B 'end':45B 'firmwar':25B 'handl':50B 'happen':55B 'keil':2A,23B,32B,69C 'leak':65B 'login':14A 'may':40B,75C 'mdk':4A,27B,34B,71C 'mdk-middlewar':3A,26B,33B,70C 'memori':9A,42B,66B 'middlewar':5A,28B,35B,72C 'out-of-bound':80C 'packag':29B 'packet':52B 'past':43B 'potenti':64B 'pre':78C 'pre-authent':77C 'process':7A,87C 'read':8A,41B,54B,84C 'remot':61B 'sender':62B 'snmp':6A,30B,51B,86C 'version':36B","nicknames":[],"mitigations":[],"who_affected":"Embedded firmware teams that build with Arm Keil MDK-Middleware 8.0.0 to 8.3.0 and ship the SNMP networking component on a device reachable over the network. Teams without SNMP enabled, or using other middleware versions, can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-26T16:17:17+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-115678","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115678","severity":null,"published_at":"2026-10-26T16:17:17+00:00","modified_at":"2026-10-26T16:17:17+00:00","first_seen_at":"2026-10-26T16:31:01+00:00","fetched_at":"2026-10-26T16:31:01+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"}