{"id":"CVE-2021-27791","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-27791","generatedAt":"2026-10-27T22:28:44.827Z","title":"An unauthenticated attacker could discover a request, which could bypass the authentication process.","description":"The function that is used to parse the Authentication header in Brocade Fabric OS Web application service before Brocade Fabric OS v9.0.1a and v8.2.3a fails to properly process a malformed authentication header from the client, resulting in reading memory addresses outside the intended range. An unauthenticated attacker could discover a request, which could bypass the authentication process.","published":"2021-08-12T15:15:08.000Z","lastModified":"2026-06-17T03:45:28.000Z","status":"Modified","sourceIdentifier":"sirt@brocade.com","cvss":{"version":"3.1","score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},"cwe":["CWE-125"],"affected":["broadcom/fabric operating system"],"epss":{"score":0.00604,"percentile":0.48629,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.60%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://security.netapp.com/advisory/ntap-20210819-0002/","tags":["Third Party Advisory"],"source":"sirt@brocade.com"},{"url":"https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1491","tags":["Vendor Advisory"],"source":"sirt@brocade.com"},{"url":"https://security.netapp.com/advisory/ntap-20210819-0002/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1491","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-27791","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}