{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-31399 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-31399 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-31399 is a medium-severity vulnerability in n/a, published on 13 Aug 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-31399 and fix it if it is affected.\n\nWhat it is: CVE-2021-31399 is a medium-severity vulnerability in n/a, published on 13 Aug 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-31399 in the wild and no public exploit code.\n\nAffected product: n/a. 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-2021-31399/ (Markdown: https://insights.sbomify.com/CVE-2021-31399/index.md)","id":"CVE-2021-31399","markdown":"https://insights.sbomify.com/CVE-2021-31399/index.md","name":"CVE-2021-31399","record":{"aliases":["GHSA-c9p5-2jv2-63vv"],"analysis":{"component_type":"iot_embedded","fix_type":"no_fix_stated","impacts":["security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Access control unit","requires_auth":"none","summary":"An attacker can perform a man-in-the-middle attack by posing as the web relay on 2N Access Unit devices.","user_interaction":"required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"access_unit_2.0_firmware","vendor":"2n"}],"cvss":{"score":4.6,"severity":"medium","source":"cna","vector":"CVSS:3.1/AC:L/AV:A/A:L/C:L/I:N/PR:N/S:U/UI:R","version":"3.1"},"cwes":[{"id":"CWE-295","name":"Improper Certificate Validation"}],"description":"On 2N Access Unit 2.0 2.31.0.40.5 devices, an attacker can pose as the web relay for a man-in-the-middle attack.","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":"Security feature bypass in n/a","id":"CVE-2021-31399","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"security_feature_bypass","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"Denial of service in n/a","id":"CVE-2021-31400"},"packages":[],"prev":{"headline":"Junos OS: When using J-Web with HTTP an attacker may retrieve encryption keys via Person-in-the-Middle attacks.","id":"CVE-2021-31386"},"products":["n/a"],"published":"2021-08-13","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":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2025-05-30","vendors":["n/a"]},"summary":"An attacker can perform a man-in-the-middle attack by posing as the web relay on 2N Access Unit devices.","url":"https://insights.sbomify.com/CVE-2021-31399/"}