{"answers":{"affected":"It affects 13 products.","exploited":"Yes. Attackers have exploited CVE-2026-21510 in the wild since at least 10 Feb 2026.","fix":"No fix has been published for CVE-2026-21510 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 3 Mar 2026.","what":"CVE-2026-21510 is a high-severity vulnerability in Microsoft Windows 10 1607, published on 10 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-21510 and fix it if it is affected.\n\nWhat it is: CVE-2026-21510 is a high-severity vulnerability in Microsoft Windows 10 1607, published on 10 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: Yes. Attackers have exploited CVE-2026-21510 in the wild since at least 10 Feb 2026.\n\nAffected product: Microsoft Windows 10 1607. 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-2026-21510/ (Markdown: https://insights.sbomify.com/CVE-2026-21510/index.md)","id":"CVE-2026-21510","markdown":"https://insights.sbomify.com/CVE-2026-21510/index.md","name":"CVE-2026-21510","record":{"aliases":["GHSA-q6v4-4w5r-j7hr"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Windows Shell","requires_auth":"none","summary":"An unauthorized attacker can bypass a Windows Shell security feature over a network, requiring OS patches.","user_interaction":"required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"windows_10_1607","vendor":"microsoft"},{"product":"windows_10_1809","vendor":"microsoft"},{"product":"windows_10_21h2","vendor":"microsoft"},{"product":"windows_10_22h2","vendor":"microsoft"},{"product":"windows_11_23h2","vendor":"microsoft"},{"product":"windows_11_24h2","vendor":"microsoft"},{"product":"windows_11_25h2","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_2022_23h2","vendor":"microsoft"},{"product":"windows_server_2025","vendor":"microsoft"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C","version":"3.1"},"cwes":[{"id":"CWE-693","name":"Protection Mechanism Failure"}],"description":"Protection mechanism failure in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-02-11","github_poc":2,"max_poc_stars":7,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-02-11T23:02:06Z","kind":"github_poc","ref":"https://github.com/andreassudo/CVE-2026-21510-CVSS-8.8-Important-Windows-Shell-security-feature-bypass","stars":7,"title":"CVE-2026-21510 (CVSS 8.8, Important) — Windows Shell security feature bypass. An attacker can trick a user into clicking a malicious link or shortcut file to bypass SmartScreen/Shell warnings and execute code without prompts. Publicly disclosed and exploited."},{"date":"2026-05-09T14:50:50Z","kind":"github_poc","ref":"https://github.com/EpSiLoNPoInTOrI/EpSiLoNPoInTlnk","stars":2,"title":" CVE-2026-21510 LNK generator PoC"}],"tier":"exploited"},"has_fix":null,"headline":"Microsoft Windows Shell Protection Mechanism Failure","id":"CVE-2026-21510","indexable":true,"kev":{"dateAdded":"2026-02-10","dueDate":"2026-03-03","knownRansomwareCampaignUse":"Unknown","product":"Windows","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.","vendorProject":"Microsoft","vulnerabilityName":"Microsoft Windows Shell Protection Mechanism Failure Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":"microsoft:windows_10_1607","products":["microsoft:windows_10_1607","microsoft:windows_10_1809","microsoft:windows_10_21h2","microsoft:windows_10_22h2","microsoft:windows_11_23h2","microsoft:windows_11_24h2","microsoft:windows_11_25h2","microsoft:windows_server_2012","microsoft:windows_server_2016","microsoft:windows_server_2019","microsoft:windows_server_2022","microsoft:windows_server_2022_23h2","microsoft:windows_server_2025"],"type":"security_feature_bypass","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Microsoft Outlook Spoofing Vulnerability","id":"CVE-2026-21511"},"packages":[],"prev":{"headline":"Microsoft Office Security Feature Bypass","id":"CVE-2026-21509"},"products":["Windows 10 Version 1607","Windows 10 Version 1809","Windows 10 Version 21H2","Windows 10 Version 22H2","Windows 11 Version 23H2","Windows 11 Version 24H2","Windows 11 Version 25H2","Windows 11 Version 26H1","Windows 11 version 22H3","Windows 11 version 26H1","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 2022, 23H2 Edition (Server Core installation)","Windows Server 2025","Windows Server 2025 (Server Core installation)"],"published":"2026-02-10","related":[{"cvss_score":9.8,"headline":"Microsoft Internet Key Exchange (IKE) Service Extensions Double Free","id":"CVE-2026-33824","kev_date_added":"2026-08-18","published":"2026-04-14"},{"cvss_score":8.8,"headline":"Microsoft MSHTML Framework Protection Mechanism Failure","id":"CVE-2026-21513","kev_date_added":"2026-02-10","published":"2026-02-10"},{"cvss_score":8.8,"headline":"Microsoft Windows Defender SmartScreen Security Feature Bypass","id":"CVE-2023-32049","kev_date_added":"2023-07-11","published":"2023-07-11"},{"cvss_score":8.4,"headline":"Microsoft Streaming Service Untrusted Pointer Dereference","id":"CVE-2023-29360","kev_date_added":"2024-02-29","published":"2023-06-13"},{"cvss_score":7.8,"headline":"Microsoft Windows Heap-Based Buffer Overflow","id":"CVE-2026-85880","kev_date_added":"2026-09-08","published":"2026-09-08"},{"cvss_score":7.8,"headline":"Microsoft Active Directory Federation Services Insufficient Granularity of Access Control Vulnerability","id":"CVE-2026-56155","kev_date_added":"2026-07-14","published":"2026-07-14"}],"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":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"active","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-19","vendors":["Microsoft"]},"summary":"An unauthorized attacker can bypass a Windows Shell security feature over a network, requiring OS patches.","url":"https://insights.sbomify.com/CVE-2026-21510/"}