{"id":"CVE-2025-24990","kind":"vulnerability","aliases":["CVE-2025-24990"],"related":[],"title":"Microsoft is aware of vulnerabilities in the third party Agere Modem driver that ships natively with supported…","description":"Microsoft is aware of vulnerabilities in the third party Agere Modem driver that ships natively with supported Windows operating systems.  This is an announcement of the upcoming removal of ltmdm64.sys driver.  The driver has been removed in the October cumulative update.\nFax modem hardware dependent on this specific driver will no longer work on Windows.\nMicrosoft recommends removing any existing dependencies on this hardware.","summary":"A flaw in the Agere modem driver shipped with Microsoft Windows lets a local user run a pointer dereference that escalates privileges. A successful attacker gets administrator rights on the machine, and CISA lists it as exploited in the wild.","severity":"high","cvss":7.8,"epss":null,"exploited":true,"exploited_at":"2025-10-14T00:00:00+00:00","products":[{"name":"Microsoft Windows","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows 10 1507","fixed":["10.0.10240.21161"],"affected":"< 10.0.10240.21161","ecosystem":"vendor"},{"name":"microsoft windows 10 1607","fixed":["10.0.14393.8519"],"affected":"< 10.0.14393.8519","ecosystem":"vendor"},{"name":"microsoft windows 10 1809","fixed":["10.0.17763.7919"],"affected":"< 10.0.17763.7919","ecosystem":"vendor"},{"name":"microsoft windows 10 21h2","fixed":["10.0.19044.6456"],"affected":"< 10.0.19044.6456","ecosystem":"vendor"},{"name":"microsoft windows 10 22h2","fixed":["10.0.19045.6456"],"affected":"< 10.0.19045.6456","ecosystem":"vendor"},{"name":"microsoft windows 11 22h2","fixed":["10.0.22621.6060"],"affected":"< 10.0.22621.6060","ecosystem":"vendor"},{"name":"microsoft windows 11 23h2","fixed":[],"affected":"<= 10.0.22631.6060","ecosystem":"vendor"},{"name":"microsoft windows 11 24h2","fixed":["10.0.26100.6899"],"affected":"< 10.0.26100.6899","ecosystem":"vendor"},{"name":"microsoft windows 11 25h2","fixed":["10.0.26200.6899"],"affected":"< 10.0.26200.6899","ecosystem":"vendor"},{"name":"microsoft windows server 2008","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2008","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft windows server 2012","fixed":[],"affected":"= r2","ecosystem":"vendor"},{"name":"microsoft windows server 2016","fixed":[],"affected":"<= 10.0.14393.8519","ecosystem":"vendor"},{"name":"microsoft windows server 2019","fixed":["10.0.17763.7919"],"affected":"< 10.0.17763.7919","ecosystem":"vendor"},{"name":"microsoft windows server 2022","fixed":["10.0.20348.4294"],"affected":"< 10.0.20348.4294","ecosystem":"vendor"},{"name":"microsoft windows server 2022 23h2","fixed":["10.0.25398.1913"],"affected":"< 10.0.25398.1913","ecosystem":"vendor"},{"name":"microsoft windows server 2025","fixed":[],"affected":"<= 10.0.26100.6899","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","self-hosted","windows"],"not_affected_if":["no-agere-modem-driver"],"how_to_check":null,"fix":"Apply the Microsoft update or mitigation for CVE-2025-24990 per vendor instructions; if none is available, stop using the affected driver or product as CISA directs.","status":"open","published_at":"2025-10-14T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:44:34+00:00","updated_at":"2026-10-23T23:44:51+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T20:44:34Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Microsoft update or mitigation for CVE-2025-24990 per vendor instructions; if none is available, stop using the affected driver or product as CISA directs.","reach":"local","summary":"A flaw in the Agere modem driver shipped with Microsoft Windows lets a local user run a pointer dereference that escalates privileges. A successful attacker gets administrator rights on the machine, and CISA lists it as exploited in the wild.","category":"infrastructure","who_cares":["windows","self-hosted"],"confidence":0.6,"needs_auth":"yes","worst_case":"local attacker gains administrator privileges on the Windows machine","analyst_note":"Find the Microsoft Security Update Guide entry for CVE-2025-24990 to confirm affected Windows builds, the patch KB, and whether the Agere modem driver is installed by default.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["no-agere-modem-driver"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000443,"input_tokens":2555,"output_tokens":374,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2025':19A,22A '-24990':20A,23A '10':28A,32A,36A,40A,44A '11':48A,52A,56A,60A '1507':29A '1607':33A '1809':37A '2008':65A,69A '2012':73A,77A '2016':81A '2019':85A '2022':89A,93A '2025':98A '21h2':41A '22h2':45A,49A '23h2':53A,94A '24h2':57A '25h2':61A 'administr':131B 'ager':10A,109B,154C 'announc':168C 'attack':129B 'awar':3A,147C 'cisa':137B 'cumul':184C 'cve':18A,21A 'depend':189C,205C 'derefer':123B 'driver':12A,111B,156C,175C,177C,193C 'escal':125B 'exist':204C 'exploit':99B,141B 'fax':186C 'flaw':106B 'get':130B 'hardwar':188C,208C 'host':103B 'infrastructur':100B 'let':116B 'list':138B 'local':118B 'longer':196C 'ltmdm64.sys':174C 'machin':135B 'microsoft':1A,24A,26A,30A,34A,38A,42A,46A,50A,54A,58A,62A,66A,70A,74A,78A,82A,86A,90A,95A,114B,145C,200C 'modem':11A,110B,155C,187C 'nativ':15A,159C 'octob':183C 'oper':163C 'parti':9A,153C 'pointer':122B 'privileg':126B 'recommend':201C 'remov':172C,180C,202C 'right':132B 'run':120B 'self':102B 'self-host':101B 'server':64A,68A,72A,76A,80A,84A,88A,92A,97A 'ship':14A,112B,158C 'specif':192C 'success':128B 'support':17A,161C 'system':164C 'third':8A,152C 'upcom':171C 'updat':185C 'user':119B 'vulner':5A,149C 'wild':144B 'window':104B,115B,162C,199C 'windows':25A,27A,31A,35A,39A,43A,47A,51A,55A,59A,63A,67A,71A,75A,79A,83A,87A,91A,96A 'work':197C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2025-10-14T00:00:00+00:00","kev":{"dateAdded":"2025-10-14","dueDate":"2025-11-04","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/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-2025-24990","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-24990","severity":null,"published_at":"2025-10-14T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T13:39:29+00:00","note":null},{"source":"nvd","external_id":"CVE-2025-24990","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-24990","severity":null,"published_at":"2025-10-14T17:15:39+00:00","modified_at":"2026-06-17T08:59:56+00:00","first_seen_at":"2026-10-23T23:44:51+00:00","fetched_at":"2026-10-23T23:44:51+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"}