{"answers":{"affected":"It affects 3 products.","exploited":"Yes. Attackers have exploited CVE-2021-1647 in the wild since at least 3 Nov 2021.","fix":"No fix has been published for CVE-2021-1647 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Nov 2021.","what":"CVE-2021-1647 is a high-severity code injection vulnerability in Microsoft Security Essentials, published on 12 Jan 2021. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-1647 and fix it if it is affected.\n\nWhat it is: CVE-2021-1647 is a high-severity code injection vulnerability in Microsoft Security Essentials, published on 12 Jan 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2021-1647 in the wild since at least 3 Nov 2021.\n\nAffected product: Microsoft Security Essentials. 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-2021-1647/ (Markdown: https://insights.sbomify.com/CVE-2021-1647/index.md)","id":"CVE-2021-1647","markdown":"https://insights.sbomify.com/CVE-2021-1647/index.md","name":"CVE-2021-1647","record":{"aliases":["GHSA-4v4q-r2mh-q7w6"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Windows Defender","requires_auth":"low_privilege","summary":"An attacker can execute arbitrary code on systems running Microsoft Defender or related endpoint protection products.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"security_essentials","vendor":"microsoft"},{"product":"system_center_endpoint_protection","vendor":"microsoft"},{"product":"windows_defender","vendor":"microsoft"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C","version":"3.1"},"cwes":[],"description":"Microsoft Defender Remote Code Execution Vulnerability","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2021-01-23","github_poc":1,"max_poc_stars":1,"metasploit":0,"nuclei":0,"refs":[{"date":"2021-01-23T13:10:35Z","kind":"github_poc","ref":"https://github.com/findcool/cve-2021-1647","stars":1,"title":null}],"tier":"exploited"},"has_fix":null,"headline":"Microsoft Defender Remote Code Execution","id":"CVE-2021-1647","indexable":true,"kev":{"dateAdded":"2021-11-03","dueDate":"2021-11-17","knownRansomwareCampaignUse":"Unknown","product":"Defender","requiredAction":"Apply updates per vendor instructions.","vendorProject":"Microsoft","vulnerabilityName":"Microsoft Defender Remote Code Execution Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"code_injection","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Microsoft splwow64 Elevation of Privilege Vulnerability","id":"CVE-2021-1648"},"packages":[],"prev":{"headline":"Windows WLAN Service Elevation of Privilege Vulnerability","id":"CVE-2021-1646"},"products":["Microsoft Security Essentials","Microsoft System Center 2012 Endpoint Protection","Microsoft System Center 2012 R2 Endpoint Protection","Microsoft System Center Endpoint Protection","Windows Defender"],"published":"2021-01-12","related":[],"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":"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":"2025-10-21","vendors":["Microsoft"]},"summary":"An attacker can execute arbitrary code on systems running Microsoft Defender or related endpoint protection products.","url":"https://insights.sbomify.com/CVE-2021-1647/"}