{"answers":{"affected":"It affects 3 products.","exploited":"There is no known exploitation of CVE-2021-40456 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-40456 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-40456 is a medium-severity vulnerability in Microsoft Windows Server, published on 13 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-40456 and fix it if it is affected.\n\nWhat it is: CVE-2021-40456 is a medium-severity vulnerability in Microsoft Windows Server, published on 13 Oct 2021. 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-2021-40456 in the wild and no public exploit code.\n\nAffected product: Microsoft Windows Server. 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-2021-40456/ (Markdown: https://insights.sbomify.com/CVE-2021-40456/index.md)","id":"CVE-2021-40456","markdown":"https://insights.sbomify.com/CVE-2021-40456/index.md","name":"CVE-2021-40456","record":{"aliases":["GHSA-j5xg-6v4g-89vw"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Windows AD FS","requires_auth":"none","summary":"Attackers can bypass security features in Windows AD FS, potentially compromising authentication integrity on affected Windows Server installations.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"windows_server","vendor":"microsoft"},{"product":"windows_server_2019","vendor":"microsoft"},{"product":"windows_server_2022","vendor":"microsoft"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C","version":"3.1"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"}],"description":"Windows AD FS Security Feature Bypass Vulnerability","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 AD FS Security Feature Bypass Vulnerability","id":"CVE-2021-40456","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"microsoft:windows_server","products":["microsoft:windows_server","microsoft:windows_server_2019","microsoft:windows_server_2022"],"type":"security_feature_bypass","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Microsoft Dynamics 365 Customer Engagement Cross-Site Scripting Vulnerability","id":"CVE-2021-40457"},"packages":[],"prev":{"headline":"Windows Installer Spoofing Vulnerability","id":"CVE-2021-40455"},"products":["Windows Server 2019","Windows Server 2019 (Server Core installation)","Windows Server 2022","Windows Server version 2004","Windows Server version 20H2"],"published":"2021-10-13","related":[{"cvss_score":9.8,"headline":"Windows Network File System Remote Code Execution Vulnerability","id":"CVE-2022-26937","kev_date_added":null,"published":"2022-05-10"},{"cvss_score":8.2,"headline":"Storage Spaces Direct Elevation of Privilege Vulnerability","id":"CVE-2022-26932","kev_date_added":null,"published":"2022-05-10"},{"cvss_score":7.8,"headline":"Local Security Authority Subsystem Service Elevation of Privilege Vulnerability","id":"CVE-2022-21884","kev_date_added":null,"published":"2022-01-11"},{"cvss_score":7.8,"headline":"Microsoft Cluster Port Driver Elevation of Privilege Vulnerability","id":"CVE-2022-21910","kev_date_added":null,"published":"2022-01-11"},{"cvss_score":7.5,"headline":"Active Directory Domain Services Elevation of Privilege Vulnerability","id":"CVE-2021-42282","kev_date_added":null,"published":"2021-11-10"},{"cvss_score":7.5,"headline":"Active Directory Domain Services Elevation of Privilege Vulnerability","id":"CVE-2021-42291","kev_date_added":null,"published":"2021-11-10"},{"cvss_score":7,"headline":"Storage Spaces Direct Elevation of Privilege Vulnerability","id":"CVE-2022-26938","kev_date_added":null,"published":"2022-05-10"}],"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":"2024-08-04","vendors":["Microsoft"]},"summary":"Attackers can bypass security features in Windows AD FS, potentially compromising authentication integrity on affected Windows Server installations.","url":"https://insights.sbomify.com/CVE-2021-40456/"}