{"schemaVersion":3,"id":"CVE-2021-43074","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"An improper verification of cryptographic signature vulnerability [CWE-347] in FortiWeb 6.4 all versions, 6.3.16 and below, 6.2 all versions, 6.1 all versions, 6.0 all versions; FortiOS 7.0.3 and below, 6.4.8 and below, 6.2 all versions, 6.0 all versions; FortiSwitch 7.0.3 and below, 6.4.10 and below, 6.2 all versions, 6.0 all versions; FortiProxy 7.0.1 and below, 2.0.7 and below, 1.2 all versions, 1.1 all versions, 1.0 all versions may allow an attacker to decrypt portions of the administrative session management cookie if able to intercept the latter.","dates":{"published":"2023-02-16T18:05:27.932Z","modified":"2024-10-22T20:50:25.414Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":4.3,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":4.1,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:U/RC:C","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00287,"percentile":0.19993,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00287},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00287,"percentile":0.19993}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00287,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00287,"percentile":0.19993}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature","description":"The product does not verify, or incorrectly verifies, the cryptographic signature for data.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/347.html"}],"affected":[{"vendor":"fortinet","product":"fortios","name":"FortiOS","label":"fortios","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≥ 7.0.0, ≤ 7.0.3","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.4.0, ≤ 6.4.8","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.2.0, ≤ 6.2.12","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.0.0, ≤ 6.0.16","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.0.0, < 6.4.9","noFixRecorded":false,"fixedIn":null},{"text":"≥ 7.0.0, < 7.0.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 7.0.0, ≤ 7.0.3 | ≥ 6.4.0, ≤ 6.4.8 | ≥ 6.2.0, ≤ 6.2.12 | ≥ 6.0.0, ≤ 6.0.16 | ≥ 6.0.0, < 6.4.9 | ≥ 7.0.0, < 7.0.4","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"fortios","label":"FortiOS","category":"os"}},"hubHref":"/vendor/fortinet/fortios"},{"vendor":"fortinet","product":"fortiproxy","name":"fortiproxy","label":"fortiproxy","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 7.0.0, ≤ 7.0.1","noFixRecorded":false,"fixedIn":null},{"text":"≥ 2.0.0, ≤ 2.0.7","noFixRecorded":false,"fixedIn":null},{"text":"≥ 1.2.0, ≤ 1.2.13","noFixRecorded":false,"fixedIn":null},{"text":"≥ 1.1.0, ≤ 1.1.6","noFixRecorded":false,"fixedIn":null},{"text":"≥ 1.0.0, ≤ 1.0.7","noFixRecorded":false,"fixedIn":null},{"text":"≥ 1.0.0, < 2.0.8","noFixRecorded":false,"fixedIn":null},{"text":"≥ 7.0.0, < 7.0.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 7.0.0, ≤ 7.0.1 | ≥ 2.0.0, ≤ 2.0.7 | ≥ 1.2.0, ≤ 1.2.13 | ≥ 1.1.0, ≤ 1.1.6 | ≥ 1.0.0, ≤ 1.0.7 | ≥ 1.0.0, < 2.0.8 | ≥ 7.0.0, < 7.0.2","eol":null,"hubHref":"/vendor/fortinet/fortiproxy"},{"vendor":"fortinet","product":"fortiswitch","name":"FortiSwitch","label":"fortiswitch","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 7.0.0, ≤ 7.0.3","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.4.0, ≤ 6.4.10","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.2.0, ≤ 6.2.7","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.0.0, ≤ 6.0.7","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.0.0, < 6.4.11","noFixRecorded":false,"fixedIn":null},{"text":"≥ 7.0.0, < 7.0.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 7.0.0, ≤ 7.0.3 | ≥ 6.4.0, ≤ 6.4.10 | ≥ 6.2.0, ≤ 6.2.7 | ≥ 6.0.0, ≤ 6.0.7 | ≥ 6.0.0, < 6.4.11 | ≥ 7.0.0, < 7.0.4","eol":null,"hubHref":"/vendor/fortinet/fortiswitch"},{"vendor":"fortinet","product":"fortiweb","name":"FortiWeb","label":"fortiweb","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 6.4.0, ≤ 6.4.2","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.3.0, ≤ 6.3.16","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.2.0, ≤ 6.2.7","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.1.0, ≤ 6.1.3","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.0.0, ≤ 6.0.8","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.0.0, < 6.3.17","noFixRecorded":false,"fixedIn":null},{"text":"≥ 6.4.0, < 7.0.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 6.4.0, ≤ 6.4.2 | ≥ 6.3.0, ≤ 6.3.16 | ≥ 6.2.0, ≤ 6.2.7 | ≥ 6.1.0, ≤ 6.1.3 | ≥ 6.0.0, ≤ 6.0.8 | ≥ 6.0.0, < 6.3.17 | ≥ 6.4.0, < 7.0.0","eol":null,"hubHref":"/vendor/fortinet/fortiweb"}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://fortiguard.com/psirt/FG-IR-21-126","label":"fortiguard.com/psirt/FG-IR-21-126","hostname":"fortiguard.com","tags":["Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2023-02-16T18:05:27.932Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-10-22T20:50:25.414Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":17,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T21:51:11.586Z","stale":false,"partial":false}}