{"id":"CVE-2024-21410","kind":"vulnerability","aliases":["CVE-2024-21410"],"related":[],"title":"Microsoft Exchange Server Elevation of Privilege Vulnerability","description":"Microsoft Exchange Server contains an unspecified vulnerability that allows for privilege escalation.\n\nCISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","summary":"Microsoft Exchange Server has a privilege escalation flaw that attackers are actively exploiting in the wild, per CISA's Known Exploited Vulnerabilities catalog. The sources do not describe the exact entry point or what the escalated privileges grant beyond general privilege escalation.","severity":"critical","cvss":9.8,"epss":null,"exploited":true,"exploited_at":"2024-02-15T00:00:00+00:00","products":[{"name":"Microsoft Exchange Server","fixed":[],"affected":"","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","infrastructure","on-premises-exchange","windows"],"not_affected_if":["exchange-online"],"how_to_check":null,"fix":"Apply the mitigations or patches from Microsoft's vendor advisory for CVE-2024-21410; CISA says to discontinue use of the product if mitigations are unavailable.","status":"open","published_at":"2024-02-13T18:15:59+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T21:02:21+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:02:21Z","model":"claude-haiku-5-5","output":{"fix":"Apply the mitigations or patches from Microsoft's vendor advisory for CVE-2024-21410; CISA says to discontinue use of the product if mitigations are unavailable.","reach":"unknown","impact":"high","summary":"Microsoft Exchange Server has a privilege escalation flaw that attackers are actively exploiting in the wild, per CISA's Known Exploited Vulnerabilities catalog. The sources do not describe the exact entry point or what the escalated privileges grant beyond general privilege escalation.","category":"infrastructure","who_cares":["exchange-server","on-premises-exchange","windows"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker gains elevated privileges on the Exchange server, exact scope unknown","analyst_note":"Find Microsoft's advisory for CVE-2024-21410 to confirm affected and fixed builds, required auth, and the specific mitigation steps and detection checks.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["exchange-online"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000484,"input_tokens":2802,"output_tokens":408,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2024':9A,12A '-21410':10A,13A 'action':89C 'activ':44B 'allow':83C 'appli':90C 'attack':42B 'beyond':71B 'catalog':55B 'cisa':50B,87C 'contain':78C 'cve':8A,11A 'describ':60B 'discontinu':96C 'elev':4A 'entri':63B 'escal':39B,68B,74B,86C 'exact':62B 'exchang':2A,24B,31B,34B,76C 'exchange':15A,18A,21A 'exchange-serv':23B 'exploit':26B,45B,53B 'flaw':40B 'general':72B 'grant':70B 'infrastructur':27B 'instruct':94C 'known':52B 'microsoft':1A,14A,17A,20A,33B,75C 'mitig':91C,102C 'on-premises-exchang':28B 'per':49B,92C 'point':64B 'premis':30B 'privileg':6A,38B,69B,73B,85C 'product':100C 'requir':88C 'server':3A,16A,19A,22A,25B,35B,77C 'sourc':57B 'unavail':104C 'unspecifi':80C 'use':97C 'vendor':93C 'vulner':7A,54B,81C 'wild':48B 'window':32B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2024-02-13T18:15:59+00:00","kev":{"dateAdded":"2024-02-15","dueDate":"2024-03-07","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":"secure@microsoft.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2024-21410","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2024-21410","severity":null,"published_at":"2024-02-15T00:00:00+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-2024-21410","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-21410","severity":null,"published_at":"2024-02-13T18:15:59+00:00","modified_at":"2026-06-17T07:09:14+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"}