{"cve":{"cve_id":"CVE-2026-68820","is_kev":true,"kev_date_added":"2026-08-11","kev_vendor_project":"Microsoft","kev_product":"Windows Ancillary Function Driver for WinSock ","kev_vulnerability_name":"Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability","kev_short_description":"Microsoft Windows Ancillary Function Driver for WinSock contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally.","kev_required_action":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","kev_due_date":"2026-08-25","kev_known_ransomware":false,"kev_notes":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-68820 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-68820","kev_cwes":["CWE-416"],"epss_score":0.06184,"epss_percentile":0.92963,"epss_as_of":"2026-08-26","description":"Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.","published_at":"2026-08-11T17:05:15.930000Z","last_modified_at":"2026-08-16T19:17:24.183000Z","cvss_v3_score":7.0,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"active","ssvc_automatable":false,"ssvc_technical_impact":"total","cwes":["CWE-416"],"nvd_references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68820"],"vuln_status":"Analyzed","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-08-11T20:19:07.861854Z","updated_at":"2026-08-17T18:54:36.325759Z"},"effective_severity":"HIGH","badges":["kev","news"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"H","value_label":"High"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"},{"metric":"E","name":"E","value":"U","value_label":"Unchanged"},{"metric":"RL","name":"RL","value":"O","value_label":"O"},{"metric":"RC","name":"RC","value":"C","value_label":"Changed"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-10-1607","product_name":"windows_10_1607","version_start":null,"version_start_inclusive":null,"version_end":"10.0.14393.9418","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-10-1607","product_name":"windows_10_1607","version_start":null,"version_start_inclusive":null,"version_end":"10.0.14393.9418","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-10-1809","product_name":"windows_10_1809","version_start":null,"version_start_inclusive":null,"version_end":"10.0.17763.9115","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-10-1809","product_name":"windows_10_1809","version_start":null,"version_start_inclusive":null,"version_end":"10.0.17763.9115","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-10-21h2","product_name":"windows_10_21H2","version_start":null,"version_start_inclusive":null,"version_end":"10.0.19044.7663","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-10-22h2","product_name":"windows_10_22h2","version_start":null,"version_start_inclusive":null,"version_end":"10.0.19045.7663","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-10-version-1607","product_name":"Windows 10 Version 1607","version_start":"10.0.14393.0","version_start_inclusive":true,"version_end":"10.0.14393.9418","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-1607:10.0.14393.0:10.0.14393.9418"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-10-version-1809","product_name":"Windows 10 Version 1809","version_start":"10.0.17763.0","version_start_inclusive":true,"version_end":"10.0.17763.9121","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-1809:10.0.17763.0:10.0.17763.9121"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-10-version-1809","product_name":"Windows 10 Version 1809","version_start":"10.0.17763.0","version_start_inclusive":true,"version_end":"10.0.17763.9115","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-1809:10.0.17763.0:10.0.17763.9115"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-10-version-21h2","product_name":"Windows 10 Version 21H2","version_start":"10.0.19044.0","version_start_inclusive":true,"version_end":"10.0.19044.7663","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-21h2:10.0.19044.0:10.0.19044.7663"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-10-version-22h2","product_name":"Windows 10 Version 22H2","version_start":"10.0.19045.0","version_start_inclusive":true,"version_end":"10.0.19045.7663","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-22h2:10.0.19045.0:10.0.19045.7663"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-11-23h2","product_name":"windows_11_23h2","version_start":null,"version_start_inclusive":null,"version_end":"10.0.22631.7517","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-11-24h2","product_name":"windows_11_24h2","version_start":null,"version_start_inclusive":null,"version_end":"10.0.26100.9106","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-11-25h2","product_name":"windows_11_25h2","version_start":null,"version_start_inclusive":null,"version_end":"10.0.26200.9106","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-11-26h1","product_name":"windows_11_26h1","version_start":null,"version_start_inclusive":null,"version_end":"10.0.28000.2704","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-11-version-23h2","product_name":"Windows 11 version 23H2","version_start":"10.0.22631.0","version_start_inclusive":true,"version_end":"10.0.22631.7517","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-11-version-23h2:10.0.22631.0:10.0.22631.7517"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-11-version-24h2","product_name":"Windows 11 Version 24H2","version_start":"10.0.26100.0","version_start_inclusive":true,"version_end":"10.0.26100.9168","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-11-version-24h2:10.0.26100.0:10.0.26100.9168"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-11-version-25h2","product_name":"Windows 11 Version 25H2","version_start":"10.0.26200.0","version_start_inclusive":true,"version_end":"10.0.26200.9168","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-11-version-25h2:10.0.26200.0:10.0.26200.9168"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-11-version-26h1","product_name":"Windows 11 version 26H1","version_start":"10.0.28000.0","version_start_inclusive":true,"version_end":"10.0.28000.2704","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-11-version-26h1:10.0.28000.0:10.0.28000.2704"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2012","product_name":"Windows Server 2012","version_start":"r2","version_start_inclusive":true,"version_end":"r2","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2012","product_name":"Windows Server 2012","version_start":"6.2.9200.0","version_start_inclusive":true,"version_end":"6.2.9200.26279","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2012:6.2.9200.0:6.2.9200.26279"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2012","product_name":"Windows Server 2012","version_start":"6.2.9200.0","version_start_inclusive":true,"version_end":"6.2.9200.26280","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2012:6.2.9200.0:6.2.9200.26280"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2012","product_name":"Windows Server 2012","version_start":null,"version_start_inclusive":null,"version_end":null,"version_end_inclusive":null,"cpe23_uri":"cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2012-r2","product_name":"Windows Server 2012 R2","version_start":"6.3.9600.0","version_start_inclusive":true,"version_end":"6.3.9600.23338","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2012-r2:6.3.9600.0:6.3.9600.23338"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2012-r2","product_name":"Windows Server 2012 R2","version_start":"6.3.9600.0","version_start_inclusive":true,"version_end":"6.3.9600.23337","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2012-r2:6.3.9600.0:6.3.9600.23337"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2012-r2-server-core-installation","product_name":"Windows Server 2012 R2 (Server Core installation)","version_start":"6.3.9600.0","version_start_inclusive":true,"version_end":"6.3.9600.23338","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2012-r2-server-core-installation:6.3.9600.0:6.3.9600.23338"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2012-r2-server-core-installation","product_name":"Windows Server 2012 R2 (Server Core installation)","version_start":"6.3.9600.0","version_start_inclusive":true,"version_end":"6.3.9600.23337","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2012-r2-server-core-installation:6.3.9600.0:6.3.9600.23337"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2012-server-core-installation","product_name":"Windows Server 2012 (Server Core installation)","version_start":"6.2.9200.0","version_start_inclusive":true,"version_end":"6.2.9200.26280","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2012-server-core-installation:6.2.9200.0:6.2.9200.26280"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2012-server-core-installation","product_name":"Windows Server 2012 (Server Core installation)","version_start":"6.2.9200.0","version_start_inclusive":true,"version_end":"6.2.9200.26279","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2012-server-core-installation:6.2.9200.0:6.2.9200.26279"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2016","product_name":"Windows Server 2016","version_start":"10.0.14393.0","version_start_inclusive":true,"version_end":"10.0.14393.9418","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2016:10.0.14393.0:10.0.14393.9418"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2016","product_name":"Windows Server 2016","version_start":null,"version_start_inclusive":null,"version_end":"10.0.14393.9418","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2016-server-core-installation","product_name":"Windows Server 2016 (Server Core installation)","version_start":"10.0.14393.0","version_start_inclusive":true,"version_end":"10.0.14393.9418","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2016-server-core-installation:10.0.14393.0:10.0.14393.9418"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2019","product_name":"Windows Server 2019","version_start":"10.0.17763.0","version_start_inclusive":true,"version_end":"10.0.17763.9115","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2019:10.0.17763.0:10.0.17763.9115"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2019","product_name":"Windows Server 2019","version_start":null,"version_start_inclusive":null,"version_end":"10.0.17763.9115","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2019","product_name":"Windows Server 2019","version_start":"10.0.17763.0","version_start_inclusive":true,"version_end":"10.0.17763.9121","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2019:10.0.17763.0:10.0.17763.9121"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2019-server-core-installation","product_name":"Windows Server 2019 (Server Core installation)","version_start":"10.0.17763.0","version_start_inclusive":true,"version_end":"10.0.17763.9115","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2019-server-core-installation:10.0.17763.0:10.0.17763.9115"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2019-server-core-installation","product_name":"Windows Server 2019 (Server Core installation)","version_start":"10.0.17763.0","version_start_inclusive":true,"version_end":"10.0.17763.9121","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2019-server-core-installation:10.0.17763.0:10.0.17763.9121"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2022","product_name":"Windows Server 2022","version_start":"10.0.20348.0","version_start_inclusive":true,"version_end":"10.0.20348.5499","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2022:10.0.20348.0:10.0.20348.5499"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2022","product_name":"Windows Server 2022","version_start":null,"version_start_inclusive":null,"version_end":"10.0.20348.5440","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2025","product_name":"Windows Server 2025","version_start":null,"version_start_inclusive":null,"version_end":"10.0.26100.33222","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2025","product_name":"Windows Server 2025","version_start":"10.0.26100.0","version_start_inclusive":true,"version_end":"10.0.26100.33296","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2025:10.0.26100.0:10.0.26100.33296"},{"vendor_slug":"microsoft","vendor_name":"microsoft","product_slug":"windows-server-2025-server-core-installation","product_name":"Windows Server 2025 (Server Core installation)","version_start":"10.0.26100.0","version_start_inclusive":true,"version_end":"10.0.26100.33296","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2025-server-core-installation:10.0.26100.0:10.0.26100.33296"}],"exploit_refs":[],"news":[{"id":1164,"source":"BleepingComputer","url":"https://www.bleepingcomputer.com/news/security/lazarus-hackers-exploited-windows-zero-day-to-target-defense-firms/","title":"Lazarus hackers exploited Windows zero-day to target defense firms","summary":"North Korean hackers have been exploiting a Windows zero-day vulnerability (CVE-2026-68820) to target defense-sector companies as part of the Operation Dream Job campaign. [...]","thumbnail_url":null,"author":"Bill Toulas","published_at":"2026-08-12T15:38:08Z","fetched_at":"2026-08-12T15:48:53.004803Z","trending_score":0.007633483578657459,"cve_ids":["CVE-2026-68820"]},{"id":1137,"source":"The Hacker News","url":"https://thehackernews.com/2026/08/microsoft-patches-398-flaws-including.html","title":"Microsoft Patches 398 Flaws Including a Windows Driver Zero-Day Under Active Attack","summary":"Microsoft released its monthly security updates on Tuesday, and one of the flaws it closed is already being used in attacks.\n\nThe bug sits in a core Windows kernel driver that handles network socket operations. An attacker with code already running on a machine can use it to escalate to SYSTEM. That patch goes out first.\n\nThe flaw is tracked as CVE-2026-68820 (CVSS score: 7.0) and is the only","thumbnail_url":"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4HtkIdWjqoYaSkO4edq9d5ZotqTE-LNMM14UlVoPaVKw2hwBahFYrPkB3jttURH0gcBXxCDtyHhiGMAIrxCX74gYCb_ivX4INmfRzt7HRb-bPTNt1lV-nUQm_pHQQHrhUwx4JWS7DtAzOZ1etx-yjPAVrNJXGBltqXjHPSI5NcfnWQqYurz0LK-dRRMo/s1600/aug-ms-patch.jpg","author":"info@thehackernews.com (The Hacker News)","published_at":"2026-08-11T20:10:55Z","fetched_at":"2026-08-11T21:03:53.548021Z","trending_score":0.005320569979081725,"cve_ids":["CVE-2026-68820"]}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68820","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"cisa_reported","at":"2026-08-11T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"published","at":"2026-08-11T17:05:15.930000Z","label":"CVE published","source":null},{"type":"first_article","at":"2026-08-11T20:10:55Z","label":"First news coverage","source":"The Hacker News"},{"type":"ssvc_changed","at":"2026-08-11T20:21:52.861740Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-08-11T20:21:52.861740Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-08-11T20:21:52.861740Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-08-11T20:21:52.861740Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-08-11T20:21:52.861740Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-08-11T20:21:52.861740Z","label":"CVSS score revised","source":"vulnrichment"}]}