{"id":"CVE-2021-36260","kind":"vulnerability","aliases":["CVE-2021-36260"],"related":[],"title":"Hikvision Security cameras web server: Hikvision Improper Input Validation","description":"A command injection vulnerability in the web server of some Hikvision product. Due to the insufficient input validation, attacker can exploit the vulnerability to launch a command injection attack by sending some messages with malicious commands.","summary":"Hikvision security cameras run a web server with a command injection flaw caused by missing input validation. An unauthenticated attacker can send crafted requests to run commands on the camera.","severity":"critical","cvss":9.8,"epss":0.99869,"exploited":true,"exploited_at":"2022-01-10T00:00:00+00:00","products":[{"name":"Hikvision Security cameras web server","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","hikvision","infrastructure","ip-cameras","self-hosted"],"not_affected_if":["not-internet-exposed"],"how_to_check":null,"fix":"Apply the vendor update per Hikvision instructions; CISA says to apply updates per vendor instructions.","status":"open","published_at":"2021-09-22T13:15:07+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:31:44+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:31:44Z","model":"claude-haiku-5-5","output":{"fix":"Apply the vendor update per Hikvision instructions; CISA says to apply updates per vendor instructions.","reach":"network","impact":"high","summary":"Hikvision security cameras run a web server with a command injection flaw caused by missing input validation. An unauthenticated attacker can send crafted requests to run commands on the camera.","category":"infrastructure","who_cares":["hikvision","ip-cameras","self-hosted"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker runs commands on the camera device","analyst_note":"Find the affected Hikvision models and firmware versions and the vendor advisory; the sources do not list them and the fix is only 'vendor instructions'.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["not-internet-exposed"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000443,"input_tokens":2811,"output_tokens":324,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Find the affected Hikvision models and firmware versions and the vendor advisory; the sources do not list them and the fix is only 'vendor instructions'.","search":"'-2021':11A,14A '-36260':12A,15A 'attack':49B,78C,88C 'camera':3A,26B,32B,59B 'cameras':18A 'caus':42B 'command':39B,56B,61C,86C,95C 'craft':52B 'cve':10A,13A 'due':72C 'exploit':21B,80C 'flaw':41B 'hikvis':1A,6A,22B,30B,70C 'hikvision':16A 'host':29B 'improp':7A 'infrastructur':23B 'inject':40B,62C,87C 'input':8A,45B,76C 'insuffici':75C 'ip':25B 'ip-camera':24B 'launch':84C 'malici':94C 'messag':92C 'miss':44B 'product':71C 'request':53B 'run':33B,55B 'secur':2A,31B 'security':17A 'self':28B 'self-host':27B 'send':51B,90C 'server':5A,20A,36B,67C 'unauthent':48B 'valid':9A,46B,77C 'vulner':63C,82C 'web':4A,19A,35B,66C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2021-09-22T13:15:07+00:00","kev":{"dateAdded":"2022-01-10","dueDate":"2022-01-24","requiredAction":"Apply updates per vendor instructions.","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-2021-36260","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-36260","severity":null,"published_at":"2022-01-10T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:53+00:00","fetched_at":"2026-10-25T15:39:43+00:00","note":null},{"source":"epss","external_id":"CVE-2021-36260","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-36260","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-2021-36260","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36260","severity":null,"published_at":"2021-09-22T13:15:07+00:00","modified_at":"2026-06-17T03:58:34+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+00:00","note":null}],"documents":[{"id":337,"url":"https://x.com/GreyNoiseIO/status/2110112391031857345","title":"@GreyNoiseIO: Last week, GreyNoise reported Hikvision CVE-2021-36260 exploitation attempts aga","kind":"post","source":"x","text":"Last week, GreyNoise reported Hikvision CVE-2021-36260 exploitation attempts against Ukraine that ran for nine days, then stopped.\n\nNear zero for months. A surge from Sep 23 to Oct 1, almost all from four IPs. Then nothing from those four since.\n\n🔗 Full analysis: https://t.co/7Jhdc2fSco\n\nlikes 5 reposts 2","published_at":"2026-10-13T20:56:12+00:00","relation":"discussion","confidence":null,"note":"@GreyNoiseIO"}],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}