{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2021-42757", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-42757", "idYear": 2021, "status": "PUBLISHED", "publishedAt": "2021-12-08T11:01:11.000Z", "updatedAt": "2025-10-16T09:46:26.239Z", "importedAt": "2026-10-24T01:56:32.228Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": null, "summary": "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.", "affected": [ { "vendor": "Fortinet", "product": "FortiOS", "defaultStatus": "unaffected", "versions": [ { "version": "7.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "7.0.2" }, { "version": "6.4.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.4.7" }, { "version": "6.2.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.2.9" }, { "version": "6.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.0.13" }, { "version": "5.6.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.6.14" }, { "version": "5.4.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.4.13" }, { "version": "5.2.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.2.15" }, { "version": "5.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.0.14" } ] }, { "vendor": "Fortinet", "product": "FortiDDoS-F", "defaultStatus": "unaffected", "versions": [ { "version": "6.4.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.4.1" }, { "version": "6.3.0", "status": "affected" }, { "version": "6.2.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.2.2" }, { "version": "6.1.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.1.4" } ] }, { "vendor": "Fortinet", "product": "FortiVoice", "defaultStatus": "unaffected", "versions": [ { "version": "6.4.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.4.4" }, { "version": "6.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.0.10" } ] }, { "vendor": "Fortinet", "product": "FortiProxy", "defaultStatus": "unaffected", "versions": [ { "version": "7.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "7.0.1" }, { "version": "2.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "2.0.7" }, { "version": "1.2.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "1.2.13" }, { "version": "1.1.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "1.1.6" }, { "version": "1.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "1.0.7" } ] }, { "vendor": "Fortinet", "product": "FortiRecorder", "defaultStatus": "unaffected", "versions": [ { "version": "6.4.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.4.2" }, { "version": "6.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.0.10" }, { "version": "2.7.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "2.7.7" }, { "version": "2.6.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "2.6.3" } ] }, { "vendor": "Fortinet", "product": "FortiPortal", "defaultStatus": "unaffected", "versions": [ { "version": "6.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.0.10" }, { "version": "5.3.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.3.8" }, { "version": "5.2.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.2.6" }, { "version": "5.1.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.1.2" }, { "version": "5.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.0.3" } ] }, { "vendor": "Fortinet", "product": "FortiMail", "defaultStatus": "unaffected", "versions": [ { "version": "7.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "7.0.2" }, { "version": "6.4.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.4.6" }, { "version": "6.2.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.2.7" }, { "version": "6.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.0.12" }, { "version": "5.4.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.4.12" } ] }, { "vendor": "Fortinet", "product": "FortiAnalyzer", "defaultStatus": "unaffected", "versions": [ { "version": "7.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "7.0.2" }, { "version": "6.4.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.4.7" }, { "version": "6.2.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.2.13" }, { "version": "6.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.0.12" } ] }, { "vendor": "Fortinet", "product": "FortiNDR", "defaultStatus": "unaffected", "versions": [ { "version": "1.5.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "1.5.2" }, { "version": "1.4.0", "status": "affected" }, { "version": "1.3.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "1.3.1" }, { "version": "1.2.0", "status": "affected" }, { "version": "1.1.0", "status": "affected" } ] }, { "vendor": "Fortinet", "product": "FortiDDoS", "defaultStatus": "unaffected", "versions": [ { "version": "5.5.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.5.1" }, { "version": "5.4.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.4.3" }, { "version": "5.3.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.3.2" }, { "version": "5.2.0", "status": "affected" }, { "version": "5.1.0", "status": "affected" }, { "version": "5.0.0", "status": "affected" }, { "version": "4.7.0", "status": "affected" }, { "version": "4.6.0", "status": "affected" }, { "version": "4.5.0", "status": "affected" }, { "version": "4.4.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "4.4.2" } ] }, { "vendor": "Fortinet", "product": "FortiSwitch", "defaultStatus": "unaffected", "versions": [ { "version": "7.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "7.0.3" }, { "version": "6.4.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.4.9" }, { "version": "6.2.0", "status": "affected", 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"versionType": "semver", "lessThanOrEqual": "5.0.4" } ] }, { "vendor": "Fortinet", "product": "FortiWeb", "defaultStatus": "unaffected", "versions": [ { "version": "6.4.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.4.1" }, { "version": "6.3.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.3.16" }, { "version": "6.2.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.2.8" }, { "version": "6.1.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.1.4" }, { "version": "6.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.0.8" }, { "version": "5.9.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.9.2" }, { "version": "5.8.5", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.8.7" }, { "version": "5.8.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.8.3" }, { "version": "5.7.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.7.3" }, { "version": "5.6.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.6.2" }, { "version": "5.5.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.5.7" }, { "version": "5.4.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.4.1" }, { "version": "5.3.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.3.9" }, { "version": "5.2.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.2.4" }, { "version": "5.1.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.1.4" }, { "version": "5.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "5.0.6" } ] }, { "vendor": "Fortinet", "product": "FortiManager", "defaultStatus": "unaffected", "versions": [ { "version": "7.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "7.0.2" }, { "version": "6.4.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.4.7" }, { "version": "6.2.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.2.13" }, { "version": "6.0.0", "status": "affected", "versionType": "semver", "lessThanOrEqual": "6.0.12" } ] } ] } } }