{"id":"CVE-2022-20699","kind":"vulnerability","aliases":["CVE-2022-20699"],"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":"A stack-based buffer overflow in Cisco Small Business RV160, RV260, RV340, and RV345 routers lets an attacker run arbitrary code or commands on the device. CISA lists it as actively exploited in the wild.","severity":"critical","cvss":10.0,"epss":0.72458,"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","small-business-router"],"not_affected_if":["fully-patched-firmware","other-cisco-models"],"how_to_check":"Check the firmware version on each router (admin web UI or CLI 'show version') and compare it with the fixed release in the Cisco advisory. unknown","fix":"Apply the firmware update per the Cisco vendor advisory; the fixed version is not stated in the sources. Replace or isolate unpatched routers that remain exposed to the internet.","status":"open","published_at":"2022-02-10T18:15:08+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:24:26+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:24:26Z","model":"claude-haiku-5-5","output":{"fix":"Apply the firmware update per the Cisco vendor advisory; the fixed version is not stated in the sources. Replace or isolate unpatched routers that remain exposed to the internet.","reach":"unknown","impact":"high","summary":"A stack-based buffer overflow in Cisco Small Business RV160, RV260, RV340, and RV345 routers lets an attacker run arbitrary code or commands on the device. CISA lists it as actively exploited in the wild.","category":"infrastructure","who_cares":["cisco","rv340","rv345","rv160","rv260","small-business-router"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker runs arbitrary code on the router and can bypass authentication.","analyst_note":"Find the fixed firmware versions and the exposure conditions (web management or WAN access) in the Cisco security advisory for CVE-2022-20699.","how_to_check":"Check the firmware version on each router (admin web UI or CLI 'show version') and compare it with the fixed release in the Cisco advisory. unknown","needs_analyst":true,"not_affected_if":["other-cisco-models","fully-patched-firmware"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000516,"input_tokens":2948,"output_tokens":443,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2022':24A,27A '-20699':25A,28A 'activ':81B 'advisori':144C 'allow':100C 'and':35A 'arbitrari':70B,110C,115C 'attack':68B,102C 'authent':118C 'author':120C 'base':19A,53B 'buffer':20A,54B 'busi':3A,13A,48B,59B,91C 'business':31A 'bypass':117C 'caus':127C 'cisa':77B 'cisco':1A,11A,29A,39B,57B,89C 'code':71B,111C 'command':73B,116C 'could':99C 'cve':23A,26A 'denial':128C 'detail':140C 'devic':76B 'dos':131C 'elev':112C 'execut':109C,114C 'exploit':40B,82B 'fetch':122C 'follow':108C 'inform':134C 'infrastructur':41B 'let':66B 'list':78B 'multipl':86C 'overflow':21A,55B 'privileg':113C 'protect':121C 'router':10A,16A,49B,65B,98C 'routers':38A 'run':69B,124C 'rv':14A 'rv160':4A,32A,42B,60B,92C 'rv260':5A,33A,43B,61B,93C 'rv340':6A,34A,44B,62B,94C 'rv345':8A,36A,45B,64B,96C 'section':141C 'see':138C 'seri':9A,15A,97C 'series':37A 'servic':130C 'small':2A,12A,30A,47B,58B,90C 'small-business-rout':46B 'softwar':126C 'stack':18A,52B 'stack-bas':17A,51B 'unsign':125C 'vulner':22A,87C,137C 'wild':85B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2022-02-10T18:15:08+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-2022-20699","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-20699","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":"2026-10-25T15:39:43+00:00","note":null},{"source":"epss","external_id":"CVE-2022-20699","url":"https://api.first.org/data/v1/epss?cve=CVE-2022-20699","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-2022-20699","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-20699","severity":null,"published_at":"2022-02-10T18:15:08+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"}