{"answers":{"affected":"It affects 6 products.","exploited":"There is no known exploitation of CVE-2026-83665 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-83665 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-83665 is a high-severity vulnerability in Microsoft Windows 10 1809, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-83665 and fix it if it is affected.\n\nWhat it is: CVE-2026-83665 is a high-severity vulnerability in Microsoft Windows 10 1809, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-83665 in the wild and no public exploit code.\n\nAffected product: Microsoft Windows 10 1809. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-83665/ (Markdown: https://insights.sbomify.com/CVE-2026-83665/index.md)","id":"CVE-2026-83665","markdown":"https://insights.sbomify.com/CVE-2026-83665/index.md","name":"CVE-2026-83665","record":{"aliases":["GHSA-pgx8-r9j4-5qxr"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Windows DHCP Server","requires_auth":"none","summary":"An unauthorized attacker can cause a denial of service in Windows DHCP Server via a null pointer dereference.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"windows_10_1809","vendor":"microsoft"},{"product":"windows_server_2012","vendor":"microsoft"},{"product":"windows_server_2016","vendor":"microsoft"},{"product":"windows_server_2019","vendor":"microsoft"},{"product":"windows_server_2022","vendor":"microsoft"},{"product":"windows_server_2025","vendor":"microsoft"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","version":"3.1"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"Null pointer dereference in Windows DHCP Server allows an unauthorized attacker to deny service over a network.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Windows DHCP Server Denial of Service Vulnerability","id":"CVE-2026-83665","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"microsoft:windows_10_1809","products":["microsoft:windows_10_1809","microsoft:windows_server_2012","microsoft:windows_server_2016","microsoft:windows_server_2019","microsoft:windows_server_2022","microsoft:windows_server_2025"],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Active Directory Certificate Services (AD CS) Elevation of Privilege Vulnerability","id":"CVE-2026-83666"},"packages":[],"prev":{"headline":"Windows Portable Device File System Driver Information Disclosure Vulnerability","id":"CVE-2026-83664"},"products":["Windows 10 Version 1607","Windows 10 Version 1809","Windows Server 2012","Windows Server 2012 (Server Core installation)","Windows Server 2012 R2","Windows Server 2012 R2 (Server Core installation)","Windows Server 2016","Windows Server 2016 (Server Core installation)","Windows Server 2019","Windows Server 2019 (Server Core installation)","Windows Server 2022","Windows Server 2025","Windows Server 2025 (Server Core installation)"],"published":"2026-10-13","related":[{"cvss_score":8.8,"headline":"Microsoft SmartScreen Prompt Security Feature Bypass","id":"CVE-2024-29988","kev_date_added":"2024-04-30","published":"2024-04-09"},{"cvss_score":8.1,"headline":"Microsoft Windows Internet Shortcut Files Security Feature Bypass","id":"CVE-2024-21412","kev_date_added":"2024-02-13","published":"2024-02-13"},{"cvss_score":7.8,"headline":"Microsoft Windows Use After Free","id":"CVE-2025-62221","kev_date_added":"2025-12-09","published":"2025-12-09"},{"cvss_score":7.8,"headline":"Microsoft Windows DWM Core Library Use-After-Free","id":"CVE-2025-30400","kev_date_added":"2025-05-13","published":"2025-05-13"},{"cvss_score":7.8,"headline":"Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control","id":"CVE-2024-21338","kev_date_added":"2024-03-04","published":"2024-02-13"},{"cvss_score":7.8,"headline":"Microsoft Windows Desktop Window Manager (DWM) Core Library Privilege Escalation","id":"CVE-2023-36033","kev_date_added":"2023-11-14","published":"2023-11-14"},{"cvss_score":7.8,"headline":"Microsoft Streaming Service Proxy Privilege Escalation","id":"CVE-2023-36802","kev_date_added":"2023-09-12","published":"2023-09-12"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-29","vendors":["Microsoft"]},"summary":"An unauthorized attacker can cause a denial of service in Windows DHCP Server via a null pointer dereference.","url":"https://insights.sbomify.com/CVE-2026-83665/"}