{"id":"CVE-2026-84696","state":"PUBLISHED","title":"Phison PS3111-S11 Controller Firmware Missing Authentication on Vendor Unique Commands","description":"Phison PS3111-S11 controller firmware versions through SBFQT1.3 expose privileged vendor unique commands over the ATA interface with absent or defeatable authentication mechanisms. Attackers can bypass the weak CRC-16 based unlock handshake or exploit builds with no VUC lock to read and write controller memory and raw flash, persisting implants across power cycles.","publishedAt":"2026-09-02T00:37:52.342Z","updatedAt":"2026-09-02T13:03:26.372Z","severity":{"score":9.3,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","source":"VulnCheck"},"assigner":"VulnCheck","products":["Phison Electronics Corporation PS3111-S11 Controller Firmware"],"affected":[{"vendor":"Phison Electronics Corporation","product":"PS3111-S11 Controller Firmware","defaultStatus":"unaffected","versions":[{"version":"SBFQT1.3","status":"affected","versionType":"custom"}]}],"references":["https://trulycrisp.github.io/drivefirmware/phison_s11/","https://github.com/trulycrisp/psychite","https://github.com/trulycrisp/disksec","https://www.vulncheck.com/advisories/phison-ps3111-s11-controller-firmware-missing-authentication-on-vendor-unique-commands"],"weaknesses":["CWE-306"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/84xxx/CVE-2026-84696.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-84696","state":"PUBLISHED","datePublished":"2026-09-02T00:37:52.342Z","dateUpdated":"2026-09-02T13:03:26.372Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-09-01T23:24:17.537Z"},"containers":{"cna":{"title":"Phison PS3111-S11 Controller Firmware Missing Authentication on Vendor Unique Commands","descriptions":[{"lang":"en","value":"Phison PS3111-S11 controller firmware versions through SBFQT1.3 expose privileged vendor unique commands over the ATA interface with absent or defeatable authentication mechanisms. Attackers can bypass the weak CRC-16 based unlock handshake or exploit builds with no VUC lock to read and write controller memory and raw flash, persisting implants across power cycles."}],"affected":[{"vendor":"Phison Electronics Corporation","product":"PS3111-S11 Controller Firmware","defaultStatus":"unaffected","versions":[{"version":"SBFQT1.3","status":"affected","versionType":"custom"}]}],"references":[{"url":"https://trulycrisp.github.io/drivefirmware/phison_s11/","tags":["technical-description"]},{"url":"https://github.com/trulycrisp/psychite","tags":["exploit"]},{"url":"https://github.com/trulycrisp/disksec","tags":["exploit"]},{"url":"https://www.vulncheck.com/advisories/phison-ps3111-s11-controller-firmware-missing-authentication-on-vendor-unique-commands","name":"VulnCheck Advisory: Phison PS3111-S11 Controller Firmware Missing Authentication on Vendor Unique Commands","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"HIGH","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"HIGH","baseScore":9.3,"baseSeverity":"CRITICAL"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":8.2,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-306","lang":"en","description":"Missing Authentication for Critical Function","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-09-02T00:37:52.342Z"},"datePublic":"2026-08-31T00:00:00.000Z","credits":[{"lang":"en","value":"Michael Herbert","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-02T13:03:14.346490Z","id":"CVE-2026-84696","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-02T13:03:26.372Z"}}]}}}