{"answers":{"affected":"It affects 13 products.","exploited":"There is no known exploitation of CVE-2021-42757 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-42757 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-42757 is a medium-severity memory corruption vulnerability in Fortinet Fortianalyzer, published on 8 Dec 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-2021-42757 and fix it if it is affected.\n\nWhat it is: CVE-2021-42757 is a medium-severity memory corruption vulnerability in Fortinet Fortianalyzer, published on 8 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-42757 in the wild and no public exploit code.\n\nAffected product: Fortinet Fortianalyzer. 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-2021-42757/ (Markdown: https://insights.sbomify.com/CVE-2021-42757/index.md)","id":"CVE-2021-42757","markdown":"https://insights.sbomify.com/CVE-2021-42757/index.md","name":"CVE-2021-42757","record":{"aliases":["GHSA-8xwq-gmgr-vq48"],"analysis":{"component_type":"operating_system","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"FortiOS network OS","requires_auth":"high_privilege","summary":"An authenticated local attacker can achieve arbitrary code execution via a buffer overflow in the TFTP client library of FortiOS.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"fortinet","cpe":[{"product":"fortiadc","vendor":"fortinet"},{"product":"fortianalyzer","vendor":"fortinet"},{"product":"fortimail","vendor":"fortinet"},{"product":"fortimanager","vendor":"fortinet"},{"product":"fortindr","vendor":"fortinet"},{"product":"fortios","vendor":"fortinet"},{"product":"fortios-6k7k","vendor":"fortinet"},{"product":"fortiportal","vendor":"fortinet"},{"product":"fortiproxy","vendor":"fortinet"},{"product":"fortirecorder_firmware","vendor":"fortinet"},{"product":"fortiswitch","vendor":"fortinet"},{"product":"fortivoice","vendor":"fortinet"},{"product":"fortiweb","vendor":"fortinet"}],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input"}],"description":"A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0 through 7.0.2, may allow an authenticated local attacker to achieve arbitrary code execution via specially crafted command line arguments.","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":"Memory corruption in FortiADC","id":"CVE-2021-42757","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"fortinet:fortianalyzer","products":["fortinet:fortianalyzer","fortinet:fortimanager","fortinet:fortios","fortinet:fortiproxy","fortinet:fortiweb"],"type":"memory_corruption","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Privilege escalation in Fortinet FortiWLC","id":"CVE-2021-42758"},"packages":[],"prev":{"headline":"Memory corruption in FortiWeb","id":"CVE-2021-42756"},"products":["FortiADC","FortiAnalyzer","FortiDDoS","FortiDDoS-F","FortiMail","FortiManager","FortiNDR","FortiOS","FortiPortal","FortiProxy","FortiRecorder","FortiSwitch","FortiVoice","FortiWeb"],"published":"2021-12-08","related":[{"cvss_score":4.3,"headline":"Fortinet FortiOS and FortiADC Improper Access Control","id":"CVE-2018-13374","kev_date_added":"2022-09-08","published":"2019-01-22"},{"cvss_score":8.8,"headline":"Cross-site scripting in Fortinet FortiADC","id":"CVE-2022-38374","kev_date_added":null,"published":"2022-11-02"},{"cvss_score":8.6,"headline":"Cross-site scripting in FortiADC","id":"CVE-2023-37933","kev_date_added":null,"published":"2025-03-11"},{"cvss_score":8.6,"headline":"Command injection in FortiADC","id":"CVE-2022-39947","kev_date_added":null,"published":"2023-01-03"},{"cvss_score":8,"headline":"Cross-site scripting in Fortinet FortiADC","id":"CVE-2022-35851","kev_date_added":null,"published":"2022-11-02"},{"cvss_score":7.9,"headline":"Privilege escalation in FortiADC","id":"CVE-2023-26205","kev_date_added":null,"published":"2023-11-14"},{"cvss_score":7.8,"headline":"Command injection in FortiADC","id":"CVE-2023-26210","kev_date_added":null,"published":"2023-06-13"}],"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":"2025-10-16","vendors":["Fortinet"]},"summary":"An authenticated local attacker can achieve arbitrary code execution via a buffer overflow in the TFTP client library of FortiOS.","url":"https://insights.sbomify.com/CVE-2021-42757/"}