{"id":"CVE-2026-60043","kind":"vulnerability","aliases":["CVE-2026-60043"],"related":[],"title":"XSS in mbCONNECT24 and myREX24V2 admin backend lets attacker shut down server or restore a backup (fixed in 2.21.0)","description":"An unauthenticated remote attacker can perform a XSS attack on a logged in backend user allowing for execution of multiple critical system actions. This could allow an attacker to shutdown the server or restore an uploaded backup. This can result in a loss of integrity and availability.","summary":"Cross-site scripting in the backend of MB connect line mbCONNECT24/mymbCONNECT24 and Helmholz myREX24V2/myREX24V2.virtual (remote-maintenance portals). An unauthenticated attacker can run script in a logged-in backend user's browser, which can trigger server shutdown or restore of an uploaded backup. Vendor advisories rate it 9.3 and list firmware before 2.21.0 as affected; no exploitation or PoC is reported in the advisories.","severity":"critical","cvss":9.3,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"mbCONNECT24","fixed":["2.21.0"],"affected":"< 2.21.0","ecosystem":"vendor"},{"name":"mymbCONNECT24","fixed":["2.21.0"],"affected":"< 2.21.0","ecosystem":"vendor"},{"name":"myREX24V2","fixed":["2.21.0"],"affected":"< 2.21.0","ecosystem":"vendor"},{"name":"myREX24V2.virtual","fixed":["2.21.0"],"affected":"< 2.21.0","ecosystem":"vendor"}],"ecosystems":[],"tags":["industrial","mbconnect24","mymbconnect24","myrex24v2","other","remote-access","self-hosted","web-admin-panel","xss"],"not_affected_if":[],"how_to_check":"Open the portal's firmware/version page (as admin) and confirm the firmware version. Anything below 2.21.0 on mbCONNECT24, mymbCONNECT24, myREX24V2 or myREX24V2.virtual is affected.","fix":"Update to firmware 2.21.0 (mbCONNECT24/mymbCONNECT24 per VDE-2026-079; myREX24V2/myREX24V2.virtual per VDE-2026-141). Until then, admins should not browse untrusted links or sites while logged into the backend and should restrict backend access to trusted networks (general hardening, not from the advisory).","status":"open","published_at":"2026-11-10T09:17:24+00:00","first_seen_at":"2026-11-10T09:21:09+00:00","triaged_at":"2026-11-10T09:21:13+00:00","updated_at":"2026-11-10T09:23:04+00:00","category":"other","confidence":0.9,"triage":{"at":"2026-11-10T09:21:13Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","title":"Unauthenticated XSS lets attackers run server-shutdown and backup-restore actions","impact":"high","summary":"An unauthenticated attacker can inject cross-site scripting into a page that a logged-in backend administrator views. The injected script can then trigger critical server actions such as shutting the server down or restoring an uploaded backup.","audience":"businesses","category":"other","nicknames":[],"who_cares":["web-admin-panel"],"confidence":0.4,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker shuts down the server or restores a malicious backup","analyst_note":"Identify the affected product from the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-60043, then find the fixed version and a check.","how_to_check":"unknown","plain_action":"","product_name":"unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"The sources do not name the affected product, so the flawed software is unknown. Teams that run a web application with a backend admin panel should look for it, since the attack depends on a logged-in backend user viewing attacker-controlled content.","user_interaction":"yes","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000684,"input_tokens":4539,"output_tokens":460,"severity_before":"critical"},"analyst_status":"done","analyst_note":"Identify the affected product from the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-60043, then find the fixed version and a check.","search":"'-2026':21A,24A '-60043':22A,25A '2.21.0':19A,100B '9.3':95B 'access':37B 'action':134C 'admin':6A,43B 'advisori':92B,111B 'affect':102B 'allow':127C,137C 'attack':9A,67B,115C,120C,139C 'avail':158C 'backend':7A,52B,76B,125C 'backup':16A,90B,148C 'browser':79B 'connect':55B 'could':136C 'critic':132C 'cross':47B 'cross-sit':46B 'cve':20A,23A 'execut':129C 'exploit':104B 'firmwar':98B 'fix':17A 'helmholz':59B 'host':40B 'industri':30B 'integr':156C 'let':8A 'line':56B 'list':97B 'log':74B,123C 'logged-in':73B 'loss':154C 'mainten':63B 'mb':54B 'mbconnect24':3A,26A,31B 'mbconnect24/mymbconnect24':57B 'multipl':131C 'mymbconnect24':27A,32B 'myrex24v2':5A,28A,33B 'myrex24v2.virtual':29A 'myrex24v2/myrex24v2.virtual':60B 'panel':44B 'perform':117C 'poc':106B 'portal':64B 'rate':93B 'remot':36B,62B,114C 'remote-access':35B 'remote-mainten':61B 'report':108B 'restor':14A,86B,145C 'result':151C 'run':69B 'script':49B,70B 'self':39B 'self-host':38B 'server':12A,83B,143C 'shut':10A 'shutdown':84B,141C 'site':48B 'system':133C 'trigger':82B 'unauthent':66B,113C 'upload':89B,147C 'user':77B,126C 'vendor':91B 'web':42B 'web-admin-panel':41B 'xss':1A,45B,119C","nicknames":[],"mitigations":[],"who_affected":"Teams that run their own mbCONNECT24/mymbCONNECT24 (MB connect line) or myREX24V2/myREX24V2.virtual (Helmholz) remote-maintenance portal on firmware below 2.21.0. The attack needs a logged-in backend user to be lured into viewing attacker content. Others can skip it.","tier":"B","verified":{"fix":{"at":"2026-11-10T09:23:04Z","by":"analyst","doc":"https://certvde.com/en/advisories/VDE-2026-141/","run_id":2428},"products":{"at":"2026-11-10T09:23:04Z","by":"analyst","doc":"https://certvde.com/en/advisories/VDE-2026-141/","run_id":2428},"how_to_check":{"at":"2026-11-10T09:23:04Z","by":"analyst","doc":"https://certvde.com/en/advisories/VDE-2026-141/","run_id":2428},"who_affected":{"at":"2026-11-10T09:23:04Z","by":"analyst","doc":"https://certvde.com/en/advisories/VDE-2026-141/","run_id":2428}},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":["mbconnect24","mymbconnect24","myrex24v2","myrex24v2virtual"],"ptokens":["mbconnect24","mymbconnect24","myrex24v2","virtual"],"labels":["critical","industrial","mbconnect24","mymbconnect24","myrex24v2","other","remoteaccess","selfhosted","webadminpanel","xss"],"campaign_type":null,"search_a":"'-2026':21A,24A '-60043':22A,25A '2.21.0':19A 'admin':6A 'attack':9A 'backend':7A 'backup':16A 'cve':20A,23A 'fix':17A 'let':8A 'mbconnect24':3A,26A 'mymbconnect24':27A 'myrex24v2':5A,28A 'myrex24v2.virtual':29A 'restor':14A 'server':12A 'shut':10A 'xss':1A","search_b":"'2.21.0':100B '9.3':95B 'access':37B 'admin':43B 'advisori':92B,111B 'affect':102B 'attack':67B 'backend':52B,76B 'backup':90B 'browser':79B 'connect':55B 'cross':47B 'cross-sit':46B 'exploit':104B 'firmwar':98B 'helmholz':59B 'host':40B 'industri':30B 'line':56B 'list':97B 'log':74B 'logged-in':73B 'mainten':63B 'mb':54B 'mbconnect24':31B 'mbconnect24/mymbconnect24':57B 'mymbconnect24':32B 'myrex24v2':33B 'myrex24v2/myrex24v2.virtual':60B 'panel':44B 'poc':106B 'portal':64B 'rate':93B 'remot':36B,62B 'remote-access':35B 'remote-mainten':61B 'report':108B 'restor':86B 'run':69B 'script':49B,70B 'self':39B 'self-host':38B 'server':83B 'shutdown':84B 'site':48B 'trigger':82B 'unauthent':66B 'upload':89B 'user':77B 'vendor':91B 'web':42B 'web-admin-panel':41B 'xss':45B","search_c":"'action':134C 'allow':127C,137C 'attack':115C,120C,139C 'avail':158C 'backend':125C 'backup':148C 'could':136C 'critic':132C 'execut':129C 'integr':156C 'log':123C 'loss':154C 'multipl':131C 'perform':117C 'remot':114C 'restor':145C 'result':151C 'server':143C 'shutdown':141C 'system':133C 'unauthent':113C 'upload':147C 'user':126C 'xss':119C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T09:17:24+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/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:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"info@cert.vde.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-60043","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-60043","severity":null,"published_at":"2026-11-10T09:17:24+00:00","modified_at":"2026-11-10T09:17:24+00:00","first_seen_at":"2026-11-10T09:21:09+00:00","fetched_at":"2026-11-10T09:21:09+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-60043:2428","url":"https://certvde.com/en/advisories/VDE-2026-079/","severity":null,"published_at":"2026-11-10T09:23:04+00:00","modified_at":"2026-11-10T09:23:04+00:00","first_seen_at":"2026-11-10T09:23:04+00:00","fetched_at":"2026-11-10T09:23:04+00:00","note":"Identified via CERT@VDE VDE-2026-079 and VDE-2026-141 (read directly): affected firmware <2.21.0, fix 2.21.0. How-to-check step is derived from the affected range, not stated by vendor. No exploitation/PoC seen; X and Exa checks not run beyond one search.","cites":["https://certvde.com/en/advisories/VDE-2026-079/","https://certvde.com/en/advisories/VDE-2026-141/"]}],"documents":[{"id":114178,"url":"https://certvde.com/en/advisories/VDE-2026-079/","title":"VDE-2026-079 MB connect line mbCONNECT24/mymbCONNECT24","kind":"advisory","source":"analyst","publisher":null,"text":null,"published_at":null,"relation":"advisory","confidence":null,"note":null},{"id":114179,"url":"https://certvde.com/en/advisories/VDE-2026-141/","title":"VDE-2026-141 Helmholz: Multiple Vulnerabilities in myREX24V2/myREX24V2.virtual","kind":"advisory","source":"analyst","publisher":null,"text":null,"published_at":null,"relation":"advisory","confidence":null,"note":null}],"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"}