{"id":"CVE-2021-22887","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-22887","generatedAt":"2026-10-27T20:22:44.295Z","title":"A vulnerability in the BIOS of Pulse Secure (PSA-Series Hardware) models PSA5000 and PSA7000 could allow an attacker to compromise BIOS firmware.","description":"A vulnerability in the BIOS of Pulse Secure (PSA-Series Hardware) models PSA5000 and PSA7000 could allow an attacker to compromise BIOS firmware. This vulnerability can be exploited only as part of an attack chain. Before an attacker can compromise the BIOS, they must exploit the device.","published":"2021-03-16T16:15:14.000Z","lastModified":"2026-06-17T03:37:57.000Z","status":"Modified","sourceIdentifier":"support@hackerone.com","cvss":{"version":"3.1","score":2.3,"severity":"LOW","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N"},"cwe":["CWE-506"],"affected":["pulsesecure/psa-5000 firmware","pulsesecure/psa-7000 firmware","supermicro/x10slh-f firmware","supermicro/x10sll-f firmware","supermicro/x10slm-f firmware","supermicro/x10sll\\+f firmware","supermicro/x10slm\\+-f firmware","supermicro/x10slm\\+ln4f firmware","supermicro/x10sla-f firmware","supermicro/x10sl7-f firmware","supermicro/x10sll-s firmware","supermicro/x10sll-sf firmware"],"epss":{"score":0.00276,"percentile":0.19851,"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 (0.28%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44712","tags":["Patch","Vendor Advisory"],"source":"support@hackerone.com"},{"url":"https://www.supermicro.com/en/support/security/Trickbot","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44712","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.supermicro.com/en/support/security/Trickbot","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-22887","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."}