{"id":"CVE-2023-20118","kind":"vulnerability","aliases":["CVE-2023-20118"],"related":[],"title":"A vulnerability in the web-based management interface of Cisco Small Business Routers RV016, RV042, RV042G, RV082,…","description":"A vulnerability in the web-based management interface of Cisco Small Business Routers RV016, RV042, RV042G, RV082, RV320, and RV325 Routers could allow an authenticated, remote attacker to execute arbitrary commands on an affected device.\r\n\r This vulnerability is due to improper validation of user input within incoming HTTP packets. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web-based management interface. A successful exploit could allow the attacker to gain root-level privileges and access unauthorized data. To exploit this vulnerability, an attacker would need to have valid administrative credentials on the affected device.\r\n\r Cisco has not and will not release software updates that address this vulnerability.   However, administrators may disable the affected feature as described in the Workarounds [\"#workarounds\"] section.\r\n\r  {{value}} [\"%7b%7bvalue%7d%7d\"])}]]","summary":"Multiple Cisco Small Business RV Series routers have a command injection flaw in the web management interface. An authenticated remote attacker can run commands as root and reach unauthorized data.","severity":"high","cvss":7.2,"epss":null,"exploited":true,"exploited_at":"2025-03-03T00:00:00+00:00","products":[{"name":"Cisco Small Business RV Series Routers","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"cisco rv016 firmware","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"cisco rv042 firmware","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"cisco rv042g firmware","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"cisco rv082 firmware","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"cisco rv320 firmware","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"cisco rv325 firmware","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["cisco","exploited","infrastructure","rv-series-router","small-business-network"],"not_affected_if":["no-rv-series-router","web-management-disabled"],"how_to_check":null,"fix":"Apply the mitigations in Cisco's vendor advisory, or discontinue use of the device if no mitigation is available (per CISA KEV required action).","status":"open","published_at":"2023-04-13T07:15:21+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:52:17+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"infrastructure","confidence":0.7,"triage":{"at":"2026-10-23T20:52:17Z","model":"claude-haiku-5-5","output":{"fix":"Apply the mitigations in Cisco's vendor advisory, or discontinue use of the device if no mitigation is available (per CISA KEV required action).","reach":"internet","impact":"high","summary":"Multiple Cisco Small Business RV Series routers have a command injection flaw in the web management interface. An authenticated remote attacker can run commands as root and reach unauthorized data.","category":"infrastructure","who_cares":["cisco","rv-series-router","small-business-network"],"confidence":0.7,"needs_auth":"yes","worst_case":"Attacker gets root on the router and reads unauthorized data","analyst_note":"Find affected RV model and firmware versions and the fixed release in Cisco's advisory; sources list affected/fixed as unknown; check whether the web interface is exposed to WAN.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["no-rv-series-router","web-management-disabled"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.00045,"input_tokens":2688,"output_tokens":363,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-20118':21A,24A '-2023':20A,23A '7b':221C '7bvalue':222C '7d':223C,224C 'access':173C 'address':203C 'administr':187C,207C 'affect':124C,191C,211C 'allow':113C,163C 'arbitrari':120C 'attack':80B,117C,141C,165C,181C 'authent':78B,115C 'base':7A,96C,156C 'busi':13A,58B,63B,102C 'business':27A 'cisco':11A,25A,31A,34A,37A,40A,43A,46A,49B,61B,100C,193C 'command':69B,83B,121C 'could':112C,142C,162C 'craft':149C 'credenti':188C 'cve':19A,22A 'data':89B,175C 'describ':214C 'devic':125C,192C 'disabl':209C 'due':129C 'execut':119C 'exploit':50B,143C,161C,177C 'featur':212C 'firmware':33A,36A,39A,42A,45A,48A 'flaw':71B 'gain':167C 'howev':206C 'http':138C,150C 'improp':131C 'incom':137C 'infrastructur':51B 'inject':70B 'input':135C 'interfac':9A,76B,98C,158C 'level':170C 'manag':8A,75B,97C,157C 'may':208C 'multipl':60B 'need':183C 'network':59B 'packet':139C 'privileg':171C 'reach':87B 'releas':199C 'remot':79B,116C 'request':151C 'root':85B,169C 'root-level':168C 'router':14A,55B,66B,103C,111C 'routers':30A 'run':82B 'rv':28A,53B,64B 'rv-series-rout':52B 'rv016':15A,32A,104C 'rv042':16A,35A,105C 'rv042g':17A,38A,106C 'rv082':18A,41A,107C 'rv320':44A,108C 'rv325':47A,110C 'section':219C 'send':147C 'seri':54B,65B 'series':29A 'small':12A,26A,57B,62B,101C 'small-business-network':56B 'softwar':200C 'success':160C 'unauthor':88B,174C 'updat':201C 'user':134C 'valid':132C,186C 'valu':220C 'vulner':2A,91C,127C,145C,179C,205C 'web':6A,74B,95C,155C 'web-bas':5A,94C,154C 'within':136C 'workaround':217C,218C 'would':182C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-04-13T07:15:21+00:00","kev":{"dateAdded":"2025-03-03","dueDate":"2025-03-24","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","cvss_by":"psirt@cisco.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2023-20118","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-20118","severity":null,"published_at":"2025-03-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T15:39:40+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-20118","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-20118","severity":null,"published_at":"2023-04-13T07:15:21+00:00","modified_at":"2026-06-17T05:29:31+00:00","first_seen_at":"2026-10-23T22:29:05+00:00","fetched_at":"2026-10-23T22:29:05+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"}