{"id":"CVE-2026-85079","kind":"vulnerability","aliases":["CVE-2026-85079"],"related":[],"title":"EmberZNet: malformed Simple_Desc_req response enables out-of-bounds write","description":"In EmberZNet 9.1.1 and earlier, a malformed Simple_Desc_req response can result in an out-of-bounds write potentially leading to remote code execution. This response must come from a device that has already joined the network, and the attacker must wait for a Simple_Desc_req before the attack can be performed.","summary":"EmberZNet 9.1.1 and earlier mishandle a malformed Simple_Desc_req response, causing an out-of-bounds write. The description says this can lead to remote code execution on the affected device.","severity":"high","cvss":7.5,"epss":0.00305,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["embedded","infrastructure","iot","zigbee"],"not_affected_if":["ember-stack-newer-than-9.1.1","no-zigbee-network"],"how_to_check":"- unknown","fix":"- unknown","status":"open","published_at":"2026-10-22T14:17:50+00:00","first_seen_at":"2026-10-23T21:57:31+00:00","triaged_at":"2026-10-25T03:15:12+00:00","updated_at":"2026-10-25T03:15:12+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-10-25T03:15:12Z","model":"claude-haiku-5-5","output":{"fix":"- unknown","reach":"network","title":"EmberZNet: malformed Simple_Desc_req response enables out-of-bounds write","impact":"high","summary":"EmberZNet 9.1.1 and earlier mishandle a malformed Simple_Desc_req response, causing an out-of-bounds write. The description says this can lead to remote code execution on the affected device.","category":"infrastructure","nicknames":[],"who_cares":["zigbee","embedded","iot"],"confidence":0.5,"needs_auth":"yes","worst_case":"Attacker runs code on the device via a crafted radio response","analyst_note":"Find the Silicon Labs advisory and the patched EmberZNet release version; check NVD CVE-2026-85079 references for fix details.","how_to_check":"- unknown","needs_analyst":true,"not_affected_if":["no-zigbee-network","ember-stack-newer-than-9.1.1"],"who_is_affected":"Devices running EmberZNet 9.1.1 or earlier, typically Zigbee radio stacks on embedded gateways or sensors. The attacker must wait for a Simple_Desc_req and needs a device already joined to the network to send the malformed response, so the exposure is limited to Zigbee mesh deployments. The sources do not list specific products or firmware builds.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.00058,"input_tokens":3365,"output_tokens":487,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-2026':14A,17A '-85079':15A,18A '9.1.1':24B,57C 'affect':53B 'alreadi':90C 'attack':96C,106C 'bound':11A,39B,73C 'caus':34B 'code':49B,79C 'come':84C 'cve':13A,16A 'desc':4A,31B,63C,102C 'descript':42B 'devic':54B,87C 'earlier':26B,59C 'embed':19B 'emberznet':1A,23B,56C 'enabl':7A 'execut':50B,80C 'infrastructur':20B 'iot':21B 'join':91C 'lead':46B,76C 'malform':2A,29B,61C 'mishandl':27B 'must':83C,97C 'network':93C 'out-of-bound':8A,36B,70C 'perform':109C 'potenti':75C 'remot':48B,78C 'req':5A,32B,64C,103C 'respons':6A,33B,65C,82C 'result':67C 'say':43B 'simpl':3A,30B,62C,101C 'wait':98C 'write':12A,40B,74C 'zigbe':22B","nicknames":[],"mitigations":[],"who_affected":"Devices running EmberZNet 9.1.1 or earlier, typically Zigbee radio stacks on embedded gateways or sensors. The attacker must wait for a Simple_Desc_req and needs a device already joined to the network to send the malformed response, so the exposure is limited to Zigbee mesh deployments. The sources do not list specific products or firmware builds.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-22T14:17:50+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/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":"product-security@silabs.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-85079","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85079","severity":null,"published_at":"2026-10-22T14:17:50+00:00","modified_at":"2026-10-22T19:18:02+00:00","first_seen_at":"2026-10-23T21:57:31+00:00","fetched_at":"2026-10-23T22:29:02+00:00","note":null},{"source":"epss","external_id":"CVE-2026-85079","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-85079","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T07:15:51+00:00","fetched_at":"2026-10-24T07:15:51+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"}