{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-27221 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-27221 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-27221 is a high-severity missing authorization vulnerability in Mikrotik Routeros, published on 19 Mar 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-27221 and fix it if it is affected.\n\nWhat it is: CVE-2021-27221 is a high-severity missing authorization vulnerability in Mikrotik Routeros, published on 19 Mar 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-2021-27221 in the wild and no public exploit code.\n\nAffected product: Mikrotik Routeros. 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-2021-27221/ (Markdown: https://insights.sbomify.com/CVE-2021-27221/index.md)","id":"CVE-2021-27221","markdown":"https://insights.sbomify.com/CVE-2021-27221/index.md","name":"CVE-2021-27221","record":{"aliases":["GHSA-xf77-xqpr-2gh9"],"analysis":{"component_type":"network_device","fix_type":"no_fix_stated","impacts":["data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"MikroTik RouterOS","requires_auth":"low_privilege","summary":"Authenticated FTP users can overwrite arbitrary configuration files, potentially altering device settings, though the vendor considers this intended behavior.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"routeros","vendor":"mikrotik"}],"cvss":{"score":8.1,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"cwes":[],"description":"MikroTik RouterOS 6.47.9 allows remote authenticated ftp users to create or overwrite arbitrary .rsc files via the /export command. NOTE: the vendor's position is that this is intended behavior because of how user policies work","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":"Missing authorization in n/a","id":"CVE-2021-27221","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"mikrotik:routeros","products":["mikrotik:routeros"],"type":"missing_authorization","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Cross-site scripting in n/a","id":"CVE-2021-27222"},"packages":[],"prev":{"headline":"Path traversal in n/a","id":"CVE-2021-27220"},"products":["n/a"],"published":"2021-03-19","related":[{"cvss_score":9.8,"headline":"MikroTik RouterOS Stack-Based Buffer Overflow","id":"CVE-2018-7445","kev_date_added":"2022-09-08","published":"2018-03-19"},{"cvss_score":9.2,"headline":"MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command","id":"CVE-2026-86060","kev_date_added":"2026-09-10","published":"2026-09-05"},{"cvss_score":9.1,"headline":"MikroTik Router OS Directory Traversal","id":"CVE-2018-14847","kev_date_added":"2021-12-01","published":"2018-08-02"},{"cvss_score":8.8,"headline":"MikroTik RouterOS Missing Authentication for Critical Function","id":"CVE-2026-67277","kev_date_added":"2026-09-10","published":"2026-09-05"},{"cvss_score":6.9,"headline":"Mikrotik RouterOS Improper Enforcement of Behavioral Workflow","id":"CVE-2026-67279","kev_date_added":"2026-09-25","published":"2026-09-05"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2017-20149","kev_date_added":null,"published":"2022-10-15"},{"cvss_score":9.8,"headline":"Path traversal in n/a","id":"CVE-2022-34960","kev_date_added":null,"published":"2022-08-25"}],"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":"2024-08-03","vendors":["n/a"]},"summary":"Authenticated FTP users can overwrite arbitrary configuration files, potentially altering device settings, though the vendor considers this intended behavior.","url":"https://insights.sbomify.com/CVE-2021-27221/"}