{"id":"CVE-2026-95377","kind":"vulnerability","aliases":["CVE-2026-95377"],"related":[],"title":"Zenitel EdgeAudioClient: rogue DHCP server runs commands as root on devices","description":"OS command injection in the TFTP provisioning module of Zenitel EdgeAudioClient before 9.6.3.0, and 10.x before 10.1.3.0, on VSFF6, VSFF8, VSFF8MP, VSFF8MN, and VSFT devices allows unauthenticated adjacent attackers to execute arbitrary commands as root via a crafted DHCP option 66 (TFTP Server Name) value supplied by a rogue DHCP server on the same network segment. The DHCP-supplied value is passed to a shell without sanitization. Devices using DHCP, the default configuration, are affected on every boot and lease renewal.\n\n\n\nThe same injection is also reachable via the config_update_tftp_server and sw_update_tftp_server configuration fields by an attacker able to modify the device configuration.","summary":"Zenitel EdgeAudioClient devices pass the TFTP server name from DHCP option 66 to a shell without sanitizing it. An attacker on the same network segment running a rogue DHCP server can execute arbitrary commands as root without logging in.","severity":"critical","cvss":9.4,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["edgeaudioclient","vendor","vsff6","vsff8","vsff8mn","vsff8mp","vsft","zenitel"],"not_affected_if":["patched-version","static-tftp-config"],"how_to_check":"- Check the EdgeAudioClient firmware or software version on VSFF6, VSFF8, VSFF8MP, VSFF8MN and VSFT devices against the fixed versions below.\n- Check whether devices use DHCP (the default) to obtain their TFTP server name.","fix":"- EdgeAudioClient 9.x: move to `9.6.3.0` or later.\n- EdgeAudioClient 10.x: move to `10.1.3.0` or later.","status":"open","published_at":"2026-11-13T16:19:37+00:00","first_seen_at":"2026-11-13T16:47:35+00:00","triaged_at":"2026-11-13T16:48:12+00:00","updated_at":"2026-11-13T16:48:12+00:00","category":"vendor","confidence":0.8,"triage":{"at":"2026-11-13T16:48:12Z","model":"claude-haiku-5-5","output":{"fix":"- EdgeAudioClient 9.x: move to `9.6.3.0` or later.\n- EdgeAudioClient 10.x: move to `10.1.3.0` or later.","reach":"network","title":"Zenitel EdgeAudioClient: rogue DHCP server runs commands as root on devices","impact":"high","summary":"Zenitel EdgeAudioClient devices pass the TFTP server name from DHCP option 66 to a shell without sanitizing it. An attacker on the same network segment running a rogue DHCP server can execute arbitrary commands as root without logging in.","audience":"businesses","category":"vendor","nicknames":[],"who_cares":["zenitel","edgeaudioclient","vsff6","vsff8","vsff8mp","vsff8mn","vsft"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"Commands run as root on the device, giving full control of it.","analyst_note":"Confirm the affected VSFF/VSFT model list and the 9.x/10.x fixed versions against the Zenitel vendor advisory; only NVD is cited here.","how_to_check":"- Check the EdgeAudioClient firmware or software version on VSFF6, VSFF8, VSFF8MP, VSFF8MN and VSFT devices against the fixed versions below.\n- Check whether devices use DHCP (the default) to obtain their TFTP server name.\n- unknown for any other check the sources do not describe.","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["patched-version","static-tftp-config"],"who_is_affected":"Devices running EdgeAudioClient before 9.6.3.0 or 10.x before 10.1.3.0 on VSFF6, VSFF8, VSFF8MP, VSFF8MN and VSFT hardware are exposed. Devices using DHCP, the default configuration, are affected on every boot and lease renewal, and the same flaw is reachable by anyone who can change the device's config_update_tftp_server or sw_update_tftp_server fields. Devices with static TFTP settings and no ability for an outsider to reach the device's network segment are less exposed.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"no","severity_if_unknown":"critical"},"cost_usd":0.000871,"input_tokens":4731,"output_tokens":795,"severity_before":"critical"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-95377':14A,17A '10':78C '10.1.3.0':81C '66':37B,105C '9.6.3.0':76C 'abl':169C 'adjac':92C 'affect':140C 'allow':90C 'also':151C 'arbitrari':58B,96C 'attack':45B,93C,168C 'boot':143C 'command':7A,59B,65C,97C 'config':155C 'configur':138C,164C,174C 'craft':102C 'cve':12A,15A 'default':137C 'devic':11A,28B,89C,133C,173C 'dhcp':4A,35B,54B,103C,114C,123C,135C 'dhcp-suppli':122C 'edgeaudiocli':2A,18B,27B,74C 'everi':142C 'execut':57B,95C 'field':165C 'inject':66C,149C 'leas':145C 'log':63B 'modifi':171C 'modul':71C 'name':33B,108C 'network':49B,119C 'option':36B,104C 'os':64C 'pass':29B,127C 'provis':70C 'reachabl':152C 'renew':146C 'rogu':3A,53B,113C 'root':9A,61B,99C 'run':6A,51B 'sanit':42B,132C 'segment':50B,120C 'server':5A,32B,55B,107C,115C,158C,163C 'shell':40B,130C 'suppli':110C,124C 'sw':160C 'tftp':31B,69C,106C,157C,162C 'unauthent':91C 'updat':156C,161C 'use':134C 'valu':109C,125C 'vendor':19B 'via':100C,153C 'vsff6':20B,83C 'vsff8':21B,84C 'vsff8mn':22B,86C 'vsff8mp':23B,85C 'vsft':24B,88C 'without':41B,62B,131C 'x':79C 'zenitel':1A,25B,26B,73C","nicknames":[],"mitigations":[],"who_affected":"Devices running EdgeAudioClient before 9.6.3.0 or 10.x before 10.1.3.0 on VSFF6, VSFF8, VSFF8MP, VSFF8MN and VSFT hardware are exposed. Devices using DHCP, the default configuration, are affected on every boot and lease renewal, and the same flaw is reachable by anyone who can change the device's config_update_tftp_server or sw_update_tftp_server fields. Devices with static TFTP settings and no ability for an outsider to reach the device's network segment are less exposed.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["critical","edgeaudioclient","vendor","vsff6","vsff8","vsff8mn","vsff8mp","vsft","zenitel"],"campaign_type":null,"search_a":"'-2026':13A,16A '-95377':14A,17A 'command':7A 'cve':12A,15A 'devic':11A 'dhcp':4A 'edgeaudiocli':2A 'rogu':3A 'root':9A 'run':6A 'server':5A 'zenitel':1A","search_b":"'66':37B 'arbitrari':58B 'attack':45B 'command':59B 'devic':28B 'dhcp':35B,54B 'edgeaudiocli':18B,27B 'execut':57B 'log':63B 'name':33B 'network':49B 'option':36B 'pass':29B 'rogu':53B 'root':61B 'run':51B 'sanit':42B 'segment':50B 'server':32B,55B 'shell':40B 'tftp':31B 'vendor':19B 'vsff6':20B 'vsff8':21B 'vsff8mn':22B 'vsff8mp':23B 'vsft':24B 'without':41B,62B 'zenitel':25B,26B","search_c":"'10':78C '10.1.3.0':81C '66':105C '9.6.3.0':76C 'abl':169C 'adjac':92C 'affect':140C 'allow':90C 'also':151C 'arbitrari':96C 'attack':93C,168C 'boot':143C 'command':65C,97C 'config':155C 'configur':138C,164C,174C 'craft':102C 'default':137C 'devic':89C,133C,173C 'dhcp':103C,114C,123C,135C 'dhcp-suppli':122C 'edgeaudiocli':74C 'everi':142C 'execut':95C 'field':165C 'inject':66C,149C 'leas':145C 'modifi':171C 'modul':71C 'name':108C 'network':119C 'option':104C 'os':64C 'pass':127C 'provis':70C 'reachabl':152C 'renew':146C 'rogu':113C 'root':99C 'sanit':132C 'segment':120C 'server':107C,115C,158C,163C 'shell':130C 'suppli':110C,124C 'sw':160C 'tftp':69C,106C,157C,162C 'unauthent':91C 'updat':156C,161C 'use':134C 'valu':109C,125C 'via':100C,153C 'vsff6':83C 'vsff8':84C 'vsff8mn':86C 'vsff8mp':85C 'vsft':88C 'without':131C 'x':79C 'zenitel':73C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-13T16:19:37+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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:P/AU:Y/R:X/V:X/RE:X/U:X","cvss_by":"cf9c5165-6fe5-4ec0-b5f1-404f1df30a4e","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-95377","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-95377","severity":null,"published_at":"2026-11-13T16:19:37+00:00","modified_at":"2026-11-13T16:19:37+00:00","first_seen_at":"2026-11-13T16:47:35+00:00","fetched_at":"2026-11-13T16:47:35+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"}