{"id":"CVE-2022-26923","kind":"vulnerability","aliases":["CVE-2022-26923"],"related":[],"title":"Active Directory Domain Services Elevation of Privilege Vulnerability","description":"An authenticated user could manipulate attributes on computer accounts they own or manage, and acquire a certificate from Active Directory Certificate Services that would allow for privilege escalation to SYSTEM.\n\nCISA required action: Apply updates per vendor instructions.","summary":"A flaw in Microsoft Active Directory Domain Services lets an authenticated user change attributes on computer accounts they own or manage and obtain a certificate from Active Directory Certificate Services. That certificate lets the user escalate privileges to SYSTEM.","severity":"critical","cvss":9.0,"epss":0.835,"exploited":true,"exploited_at":"2022-08-18T00:00:00+00:00","products":[{"name":"Microsoft Active Directory","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 10 1507","fixed":["10.0.10240.19297"],"affected":"< 10.0.10240.19297","ecosystem":"vendor"},{"name":"microsoft windows 10 1607","fixed":["10.0.14393.5850"],"affected":"< 10.0.14393.5850","ecosystem":"vendor"},{"name":"microsoft windows 10 1809","fixed":["10.0.17763.4252"],"affected":"< 10.0.17763.4252","ecosystem":"vendor"},{"name":"microsoft windows 10 1909","fixed":["10.0.18363.2274"],"affected":"< 10.0.18363.2274","ecosystem":"vendor"},{"name":"microsoft windows 10 20h2","fixed":["10.0.19042.1706"],"affected":"< 10.0.19042.1706","ecosystem":"vendor"},{"name":"microsoft windows 10 21h1","fixed":["10.0.19043.1706"],"affected":"< 10.0.19043.1706","ecosystem":"vendor"},{"name":"microsoft windows 10 21h2","fixed":["10.0.19044.1706"],"affected":"< 10.0.19044.1706","ecosystem":"vendor"},{"name":"microsoft windows 11 21h2","fixed":["10.0.22000.1817"],"affected":"< 10.0.22000.1817","ecosystem":"vendor"},{"name":"microsoft windows 8.1","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows rt 8.1","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows server 2016","fixed":["10.0.14393.5850"],"affected":"< 10.0.14393.5850","ecosystem":"vendor"},{"name":"microsoft windows server 2019","fixed":["10.0.17763.4252"],"affected":"< 10.0.17763.4252","ecosystem":"vendor"},{"name":"microsoft windows server 2022","fixed":["10.0.20348.1668"],"affected":"< 10.0.20348.1668","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["active-directory","active-directory-certificate-services","exploited","infrastructure","windows-server"],"not_affected_if":["no-ad-certificate-services"],"how_to_check":null,"fix":"Apply the Microsoft updates for Active Directory Domain Services per vendor instructions (CISA required action). Specific patched builds: unknown","status":"open","published_at":"2022-05-10T21:15:10+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:10:59+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"infrastructure","confidence":0.8,"triage":{"at":"2026-10-23T21:10:59Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft updates for Active Directory Domain Services per vendor instructions (CISA required action). Specific patched builds: unknown","reach":"network","impact":"high","summary":"A flaw in Microsoft Active Directory Domain Services lets an authenticated user change attributes on computer accounts they own or manage and obtain a certificate from Active Directory Certificate Services. That certificate lets the user escalate privileges to SYSTEM.","category":"infrastructure","who_cares":["active-directory","windows-server","active-directory-certificate-services"],"confidence":0.8,"needs_auth":"yes","worst_case":"Domain user gains SYSTEM privileges, potentially domain-wide control.","analyst_note":"Find the Microsoft advisory for CVE-2022-26923 to confirm patched builds and the exact AD CS and computer-account conditions, and a detection check; the sources here do not give them.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["no-ad-certificate-services"],"user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"high"},"cost_usd":0.000482,"input_tokens":2854,"output_tokens":394,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2022':10A,13A '-26923':11A,14A '10':20A,24A,28A,32A,36A,40A,44A '11':48A '1507':21A '1607':25A '1809':29A '1909':33A '2012':60A '2016':64A '2019':68A '2022':72A '20h2':37A '21h1':41A '21h2':45A,49A '8.1':52A,56A 'account':102B,133C 'acquir':139C 'action':157C 'activ':1A,74B,77B,90B,112B,143C 'active':16A 'active-directori':73B 'active-directory-certificate-servic':76B 'allow':149C 'appli':158C 'attribut':99B,130C 'authent':96B,126C 'certif':79B,110B,114B,117B,141C,145C 'chang':98B 'cisa':155C 'comput':101B,132C 'could':128C 'cve':9A,12A 'directori':2A,75B,78B,91B,113B,144C 'directory':17A 'domain':3A,92B 'elev':5A 'escal':121B,152C 'exploit':81B 'flaw':87B 'infrastructur':82B 'instruct':162C 'let':94B,118B 'manag':106B,137C 'manipul':129C 'microsoft':15A,18A,22A,26A,30A,34A,38A,42A,46A,50A,53A,57A,61A,65A,69A,89B 'obtain':108B 'per':160C 'privileg':7A,122B,151C 'requir':156C 'rt':55A 'server':59A,63A,67A,71A,85B 'servic':4A,80B,93B,115B,146C 'system':124B,154C 'updat':159C 'user':97B,120B,127C 'vendor':161C 'vulner':8A 'window':84B 'windows':19A,23A,27A,31A,35A,39A,43A,47A,51A,54A,58A,62A,66A,70A 'windows-serv':83B 'would':148C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2022-05-10T21:15:10+00:00","kev":{"dateAdded":"2022-08-18","dueDate":"2022-09-08","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/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-2022-26923","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-26923","severity":null,"published_at":"2022-08-18T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T12:39:23+00:00","note":null},{"source":"epss","external_id":"CVE-2022-26923","url":"https://api.first.org/data/v1/epss?cve=CVE-2022-26923","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:45+00:00","fetched_at":"2026-10-23T19:13:45+00:00","note":null},{"source":"nvd","external_id":"CVE-2022-26923","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-26923","severity":null,"published_at":"2022-05-10T21:15:10+00:00","modified_at":"2026-06-17T04:36:07+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"}