{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-19T18:14:21.955","vulnerabilities":[{"cve":{"id":"CVE-2021-42756","sourceIdentifier":"psirt@fortinet.com","published":"2023-02-16T19:15:11.500","lastModified":"2024-11-21T06:28:06.483","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5.x all versions, 6.0.7 and below, 6.1.2 and below, 6.2.6 and below, 6.3.16 and below, 6.4 all versions may allow an unauthenticated remote attacker to achieve arbitrary code execution via specifically crafted HTTP requests."}],"metrics":{"cvssMetricV31":[{"source":"psirt@fortinet.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}]},"weaknesses":[{"source":"psirt@fortinet.com","type":"Secondary","description":[{"lang":"en","value":"CWE-121"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-787"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6.0","versionEndExcluding":"6.0.8","matchCriteriaId":"D7C64AF2-21C5-4763-BF18-67B2D3D01614"},{"vulnerable":true,"criteria":"cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.0","versionEndExcluding":"6.1.3","matchCriteriaId":"9EFA8AB9-2777-471C-A1DA-635BDACE2F10"},{"vulnerable":true,"criteria":"cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2.0","versionEndExcluding":"6.2.7","matchCriteriaId":"919112F8-1479-45F0-BE4D-91112143D2AF"},{"vulnerable":true,"criteria":"cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3.0","versionEndExcluding":"6.3.17","matchCriteriaId":"0B1B7CFD-96E5-40EA-9CBC-48D0255081BD"},{"vulnerable":true,"criteria":"cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4.0","versionEndIncluding":"6.4.2","matchCriteriaId":"F6B93ABE-8620-4253-83C0-3D2228D20118"}]}]}],"references":[{"url":"https://fortiguard.com/psirt/FG-IR-21-186","source":"psirt@fortinet.com","tags":["Vendor Advisory"]},{"url":"https://fortiguard.com/psirt/FG-IR-21-186","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]}]}}]}