{"id":"CVE-2022-20703","kind":"vulnerability","aliases":["CVE-2022-20703"],"related":[],"title":"Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers: Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability","description":"Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers could allow an attacker to do any of the following: Execute arbitrary code Elevate privileges Execute arbitrary commands Bypass authentication and authorization protections Fetch and run unsigned software Cause denial of service (DoS) For more information about these vulnerabilities, see the Details section of this advisory.","summary":"Cisco Small Business RV160, RV260, RV340 and RV345 routers contain a stack-based buffer overflow in the web-based management code. An attacker can execute arbitrary code, bypass authentication, and run unsigned software on the router.","severity":"critical","cvss":10.0,"epss":0.09203,"exploited":true,"exploited_at":"2022-03-03T00:00:00+00:00","products":[{"name":"Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["cisco","exploited","infrastructure","rv160","rv260","rv340","rv345","self-hosted"],"not_affected_if":["default-config"],"how_to_check":null,"fix":"Apply the Cisco firmware update for the affected RV series router per the vendor advisory; the fixed version is unknown from these sources.","status":"open","published_at":"2022-02-10T18:15:09+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:24:24+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:24:24Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Cisco firmware update for the affected RV series router per the vendor advisory; the fixed version is unknown from these sources.","reach":"unknown","impact":"high","summary":"Cisco Small Business RV160, RV260, RV340 and RV345 routers contain a stack-based buffer overflow in the web-based management code. An attacker can execute arbitrary code, bypass authentication, and run unsigned software on the router.","category":"infrastructure","who_cares":["cisco","rv160","rv260","rv340","rv345","self-hosted"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker runs arbitrary code on the router and bypasses authentication.","analyst_note":"Find the Cisco advisory for CVE-2022-20703 to confirm fixed firmware versions, whether the web management interface must be exposed, and the exact check for vulnerable firmware.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["default-config"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000487,"input_tokens":2948,"output_tokens":384,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2022':24A,27A '-20703':25A,28A 'advisori':145C 'allow':101C 'and':35A 'arbitrari':76B,111C,116C 'attack':73B,103C 'authent':79B,119C 'author':121C 'base':19A,62B,69B 'buffer':20A,63B 'busi':3A,13A,51B,92C 'business':31A 'bypass':78B,118C 'caus':128C 'cisco':1A,11A,29A,39B,49B,90C 'code':71B,77B,112C 'command':117C 'contain':58B 'could':100C 'cve':23A,26A 'denial':129C 'detail':141C 'dos':132C 'elev':113C 'execut':75B,110C,115C 'exploit':40B 'fetch':123C 'follow':109C 'host':48B 'inform':135C 'infrastructur':41B 'manag':70B 'multipl':87C 'overflow':21A,64B 'privileg':114C 'protect':122C 'router':10A,16A,57B,86B,99C 'routers':38A 'run':81B,125C 'rv':14A 'rv160':4A,32A,42B,52B,93C 'rv260':5A,33A,43B,53B,94C 'rv340':6A,34A,44B,54B,95C 'rv345':8A,36A,45B,56B,97C 'section':142C 'see':139C 'self':47B 'self-host':46B 'seri':9A,15A,98C 'series':37A 'servic':131C 'small':2A,12A,30A,50B,91C 'softwar':83B,127C 'stack':18A,61B 'stack-bas':17A,60B 'unsign':82B,126C 'vulner':22A,88C,138C 'web':68B 'web-bas':67B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2022-02-10T18:15:09+00:00","kev":{"dateAdded":"2022-03-03","dueDate":"2022-03-17","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","cvss_by":"psirt@cisco.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2022-20703","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-20703","severity":null,"published_at":"2022-03-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T12:39:24+00:00","note":null},{"source":"epss","external_id":"CVE-2022-20703","url":"https://api.first.org/data/v1/epss?cve=CVE-2022-20703","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2022-20703","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-20703","severity":null,"published_at":"2022-02-10T18:15:09+00:00","modified_at":"2026-06-17T04:24:53+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+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"}