{"id":"CVE-2021-36380","kind":"vulnerability","aliases":["CVE-2021-36380"],"related":[],"title":"Sunhillo SureLine before 8.7.0.1.1 allows Unauthenticated OS Command Injection via shell metacharacters in ipAddr or…","description":"Sunhillo SureLine contains an OS command injection vulnerability that allows an attacker to cause a denial-of-service or utilize the device for persistence on the network via shell metacharacters in ipAddr or dnsAddr in /cgi/networkDiag.cgi.\n\nCISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","summary":"Sunhillo SureLine appliances have an OS command injection flaw in the networkDiag.cgi page, where shell metacharacters in the ipAddr or dnsAddr parameters are passed to the shell. An attacker can use it to crash the device or keep a foothold on the network.","severity":"critical","cvss":10.0,"epss":null,"exploited":true,"exploited_at":"2024-03-05T00:00:00+00:00","products":[{"name":"sunhillo sureline","fixed":["8.7.0.1.1"],"affected":"< 8.7.0.1.1","ecosystem":"vendor"},{"name":"Sunhillo SureLine","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","network-appliance","sunhillo","sureline"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply the vendor mitigations per CISA guidance, or discontinue use of the product if no mitigation is available.","status":"open","published_at":"2021-08-13T16:15:07+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T21:02:17+00:00","updated_at":"2026-10-24T00:09:51+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:02:17Z","model":"claude-haiku-5-5","output":{"fix":"Apply the vendor mitigations per CISA guidance, or discontinue use of the product if no mitigation is available.","reach":"network","impact":"high","summary":"Sunhillo SureLine appliances have an OS command injection flaw in the networkDiag.cgi page, where shell metacharacters in the ipAddr or dnsAddr parameters are passed to the shell. An attacker can use it to crash the device or keep a foothold on the network.","category":"infrastructure","who_cares":["sunhillo","sureline","network-appliance"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker runs OS commands on the appliance and keeps persistent network access","analyst_note":"Find the vendor advisory and the fixed version for SureLine, and confirm whether the /cgi/networkDiag.cgi page is reachable on the admin interface; CISA KEV entry lists the required action.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000478,"input_tokens":2855,"output_tokens":384,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2021':16A,19A '-36380':17A,20A '/cgi/networkdiag.cgi':111C '8.7.0.1.1':4A 'action':114C 'allow':5A,84C 'appli':115C 'applianc':29B,34B 'attack':60B,86C 'caus':88C 'cisa':112C 'command':8A,38B,80C 'contain':77C 'crash':65B 'cve':15A,18A 'denial':91C 'denial-of-servic':90C 'devic':67B,97C 'discontinu':121C 'dnsaddr':52B,109C 'exploit':25B 'flaw':40B 'foothold':71B 'infrastructur':26B 'inject':9A,39B,81C 'instruct':119C 'ipaddr':14A,50B,107C 'keep':69B 'metacharact':12A,47B,105C 'mitig':116C,127C 'network':28B,74B,102C 'network-appli':27B 'networkdiag.cgi':43B 'os':7A,37B,79C 'page':44B 'paramet':53B 'pass':55B 'per':117C 'persist':99C 'product':125C 'requir':113C 'servic':93C 'shell':11A,46B,58B,104C 'sunhillo':1A,21A,23A,30B,32B,75C 'surelin':2A,31B,33B,76C 'sureline':22A,24A 'unauthent':6A 'unavail':129C 'use':62B,122C 'util':95C 'vendor':118C 'via':10A,103C 'vulner':82C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2021-08-13T16:15:07+00:00","kev":{"dateAdded":"2024-03-05","dueDate":"2024-03-26","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2021-36380","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-36380","severity":null,"published_at":"2024-03-05T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T12:39:22+00:00","note":null},{"source":"nvd","external_id":"CVE-2021-36380","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36380","severity":null,"published_at":"2021-08-13T16:15:07+00:00","modified_at":"2026-06-17T03:58:46+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"}