{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-34458 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-34458 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-34458 is a critical code injection vulnerability in Microsoft Windows Server 2016, published on 16 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-34458 and fix it if it is affected.\n\nWhat it is: CVE-2021-34458 is a critical code injection vulnerability in Microsoft Windows Server 2016, published on 16 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-34458 in the wild and no public exploit code.\n\nAffected product: Microsoft Windows Server 2016. 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-2021-34458/ (Markdown: https://insights.sbomify.com/CVE-2021-34458/index.md)","id":"CVE-2021-34458","markdown":"https://insights.sbomify.com/CVE-2021-34458/index.md","name":"CVE-2021-34458","record":{"aliases":["GHSA-35fh-hcwr-mcv6"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Windows Kernel","requires_auth":"low_privilege","summary":"An attacker can execute arbitrary code on Windows Server systems via a kernel vulnerability, requiring immediate patching.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"windows_server_2016","vendor":"microsoft"},{"product":"windows_server_2019","vendor":"microsoft"}],"cvss":{"score":9.9,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C","version":"3.1"},"cwes":[],"description":"Windows Kernel Remote Code Execution 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 Kernel Remote Code Execution Vulnerability","id":"CVE-2021-34458","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"microsoft:windows_server_2016","products":["microsoft:windows_server_2016","microsoft:windows_server_2019"],"type":"code_injection","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Windows AppContainer Elevation Of Privilege Vulnerability","id":"CVE-2021-34459"},"packages":[],"prev":{"headline":"Windows Remote Access Connection Manager Information Disclosure Vulnerability","id":"CVE-2021-34457"},"products":["Windows Server 2016","Windows Server 2016 (Server Core installation)","Windows Server 2019","Windows Server 2019 (Server Core installation)","Windows Server version 2004","Windows Server version 20H2"],"published":"2021-07-16","related":[{"cvss_score":9.8,"headline":"Windows Remote Desktop Licensing Service Remote Code Execution Vulnerability","id":"CVE-2024-38076","kev_date_added":null,"published":"2024-07-09"},{"cvss_score":8.7,"headline":"Windows Hello Security Feature Bypass Vulnerability","id":"CVE-2026-27928","kev_date_added":null,"published":"2026-04-14"},{"cvss_score":8.1,"headline":"Windows Remote Desktop Services Remote Code Execution Vulnerability","id":"CVE-2025-27482","kev_date_added":null,"published":"2025-04-08"},{"cvss_score":8.1,"headline":"Windows Remote Desktop Services Remote Code Execution Vulnerability","id":"CVE-2024-49106","kev_date_added":null,"published":"2024-12-10"},{"cvss_score":8.1,"headline":"Windows Remote Desktop Services Remote Code Execution Vulnerability","id":"CVE-2024-49108","kev_date_added":null,"published":"2024-12-10"},{"cvss_score":8.1,"headline":"Windows Remote Desktop Services Remote Code Execution Vulnerability","id":"CVE-2024-49115","kev_date_added":null,"published":"2024-12-10"}],"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":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-08-10","vendors":["Microsoft"]},"summary":"An attacker can execute arbitrary code on Windows Server systems via a kernel vulnerability, requiring immediate patching.","url":"https://insights.sbomify.com/CVE-2021-34458/"}