{"id":"CVE-2026-102816","kind":"vulnerability","aliases":["CVE-2026-102816"],"related":[],"title":"TP-Link RE305 V3: unauthenticated region change disrupts Wi-Fi service","description":"An authorization vulnerability exists in the country or region configuration interface of TP-Link RE305 V3. An unauthenticated attacker on the same local network may modify the wireless regulatory region and force the device to reapply its wireless configuration. \n\n\n\n\n\nSuccessful exploitation may cause wireless connection interruptions, unavailable channels, client disconnections, or wireless service instability, and may cause the device to apply parameters intended for a different regulatory region.","summary":"The country or region setting on the TP-Link RE305 V3 range extender can be changed without authorization. An attacker on the same local network can force the device to reapply its wireless configuration, causing Wi-Fi drops, unavailable channels and client disconnections.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["home-network","infrastructure","re305","small-office","tp-link","wifi"],"not_affected_if":["no-untrusted-lan-access","not-re305-v3"],"how_to_check":"- Log in to the device admin page and check the country or region setting under wireless settings.\n- Check the firmware version in the device admin page against the vendor advisory; the sources do not give affected versions.","fix":"- Update the RE305 V3 firmware to a version the vendor lists as fixed; the sources do not name the version.\n- Restrict access to the device admin interface to trusted hosts on the local network.","status":"open","published_at":"2026-10-27T18:17:30+00:00","first_seen_at":"2026-10-27T18:32:58+00:00","triaged_at":"2026-10-27T18:35:01+00:00","updated_at":"2026-10-27T18:35:01+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-27T18:35:01Z","model":"claude-haiku-5-5","output":{"fix":"- Update the RE305 V3 firmware to a version the vendor lists as fixed; the sources do not name the version.\n- Restrict access to the device admin interface to trusted hosts on the local network.","reach":"network","title":"TP-Link RE305 V3: unauthenticated region change disrupts Wi-Fi service","impact":"low","summary":"The country or region setting on the TP-Link RE305 V3 range extender can be changed without authorization. An attacker on the same local network can force the device to reapply its wireless configuration, causing Wi-Fi drops, unavailable channels and client disconnections.","category":"infrastructure","nicknames":[],"who_cares":["tp-link","re305","wifi","home-network","small-office"],"confidence":0.6,"needs_auth":"no","worst_case":"Wireless service interrupted and device applies another region's settings","analyst_note":"Confirm affected and fixed firmware versions and the vendor advisory for the RE305 V3; the NVD entry gives no version data.","how_to_check":"- Log in to the device admin page and check the country or region setting under wireless settings.\n- Check the firmware version in the device admin page against the vendor advisory; the sources do not give affected versions.","needs_analyst":true,"not_affected_if":["not-re305-v3","no-untrusted-lan-access"],"who_is_affected":"Owners of TP-Link RE305 V3 range extenders where an attacker can reach the device's management interface over the local network. The sources do not say which firmware versions are affected. Devices not on the RE305 V3 model, or not reachable from untrusted local clients, carry less risk.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000631,"input_tokens":3356,"output_tokens":591,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-102816':16A,19A '-2026':15A,18A 'appli':138C 'attack':52B,96C 'author':50B,78C 'caus':67B,120C,134C 'chang':8A,48B 'channel':73B,125C 'client':75B,126C 'configur':66B,86C,116C 'connect':122C 'countri':33B,83C 'cve':14A,17A 'devic':61B,111C,136C 'differ':143C 'disconnect':76B,127C 'disrupt':9A 'drop':71B 'exist':80C 'exploit':118C 'extend':45B 'fi':12A,70B 'forc':59B,109C 'home':21B 'home-network':20B 'infrastructur':23B 'instabl':131C 'intend':140C 'interfac':87C 'interrupt':123C 'link':3A,30B,41B,91C 'local':56B,100C 'may':102C,119C,133C 'modifi':103C 'network':22B,57B,101C 'offic':27B 'paramet':139C 'rang':44B 're305':4A,24B,42B,92C 'reappli':63B,113C 'region':7A,35B,85C,107C,145C 'regulatori':106C,144C 'servic':13A,130C 'set':36B 'small':26B 'small-offic':25B 'success':117C 'tp':2A,29B,40B,90C 'tp-link':1A,28B,39B,89C 'unauthent':6A,95C 'unavail':72B,124C 'v3':5A,43B,93C 'vulner':79C 'wi':11A,69B 'wi-fi':10A,68B 'wifi':31B 'wireless':65B,105C,115C,121C,129C 'without':49B","nicknames":[],"mitigations":[],"who_affected":"Owners of TP-Link RE305 V3 range extenders where an attacker can reach the device's management interface over the local network. The sources do not say which firmware versions are affected. Devices not on the RE305 V3 model, or not reachable from untrusted local clients, carry less risk.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T18:17:30+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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":"f23511db-6c3e-4e32-a477-6aa17d310630","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-102816","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102816","severity":null,"published_at":"2026-10-27T18:17:30+00:00","modified_at":"2026-10-27T18:17:30+00:00","first_seen_at":"2026-10-27T18:32:58+00:00","fetched_at":"2026-10-27T18:32:58+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"}