{"id":"CVE-2022-41082","kind":"vulnerability","aliases":["CVE-2022-41082"],"related":[],"title":"Microsoft Exchange Server Remote Code Execution Vulnerability","description":"Microsoft Exchange Server contains an unspecified vulnerability that allows for authenticated remote code execution. Dubbed \"ProxyNotShell,\" this vulnerability is chainable with CVE-2022-41040 which allows for the remote code execution.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Microsoft Exchange Server has an unspecified flaw that lets an authenticated user run code remotely, and it is chained with CVE-2022-41040 (ProxyNotShell). Attackers are exploiting it in the wild, including in ransomware campaigns.","severity":"critical","cvss":8.0,"epss":null,"exploited":true,"exploited_at":"2022-09-30T00:00:00+00:00","products":[{"name":"Microsoft Exchange Server","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft exchange server","fixed":[],"affected":"= 2013","ecosystem":"vendor"},{"name":"microsoft exchange server","fixed":[],"affected":"= 2016","ecosystem":"vendor"},{"name":"microsoft exchange server","fixed":[],"affected":"= 2019","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exchange-server","exploited","on-prem-exchange","ransomware","vendor","windows"],"not_affected_if":["exchange-online","no-exchange-server"],"how_to_check":null,"fix":"Apply the Microsoft updates for Exchange Server per vendor instructions; the specific patched build numbers are not in the sources.","status":"open","published_at":"2022-09-30T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:10:32+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"vendor","confidence":0.7,"triage":{"at":"2026-10-23T21:10:32Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft updates for Exchange Server per vendor instructions; the specific patched build numbers are not in the sources.","reach":"internet","impact":"high","summary":"Microsoft Exchange Server has an unspecified flaw that lets an authenticated user run code remotely, and it is chained with CVE-2022-41040 (ProxyNotShell). Attackers are exploiting it in the wild, including in ransomware campaigns.","category":"vendor","who_cares":["exchange-server","on-prem-exchange","windows"],"confidence":0.7,"needs_auth":"yes","worst_case":"Attacker runs code on the Exchange server after gaining a valid login","analyst_note":"Find the Microsoft Security Update Guide entry for CVE-2022-41082 to confirm affected build ranges, patched builds and the mitigation steps.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["exchange-online","no-exchange-server"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000472,"input_tokens":2836,"output_tokens":377,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2022':9A,12A,58B,94C '-41040':59B,95C '-41082':10A,13A 'action':105C 'allow':80C,97C 'appli':106C 'attack':61B 'authent':47B,82C 'campaign':71B 'chain':55B 'chainabl':91C 'cisa':103C 'code':5A,50B,84C,101C 'contain':75C 'cve':8A,11A,57B,93C 'dub':86C 'exchang':2A,27B,33B,38B,73C 'exchange':15A,18A,21A,24A 'exchange-serv':26B 'execut':6A,85C,102C 'exploit':29B,63B 'flaw':43B 'includ':68B 'instruct':110C 'let':45B 'microsoft':1A,14A,17A,20A,23A,37B,72C 'on-prem-exchang':30B 'per':108C 'prem':32B 'proxynotshel':60B,87C 'ransomwar':34B,70B 'remot':4A,51B,83C,100C 'requir':104C 'run':49B 'server':3A,16A,19A,22A,25A,28B,39B,74C 'unspecifi':42B,77C 'updat':107C 'user':48B 'vendor':35B,109C 'vulner':7A,78C,89C 'wild':67B 'window':36B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2022-09-30T00:00:00+00:00","kev":{"dateAdded":"2022-09-30","dueDate":"2022-10-21","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Known"},"cvss_vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2022-41082","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-41082","severity":null,"published_at":"2022-09-30T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T17:39:57+00:00","note":null},{"source":"nvd","external_id":"CVE-2022-41082","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-41082","severity":null,"published_at":"2022-10-03T01:15:08+00:00","modified_at":"2026-06-17T05:02:33+00:00","first_seen_at":"2026-10-23T22:29:04+00:00","fetched_at":"2026-10-23T22:29:04+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"}