Vulnerability-Lookup

CVE-2026-84696 (GCVE-0-2026-84696)

Vulnerability from cvelistv5 – Published: 2026-09-02 00:37 – Updated: 2026-09-02 13:03

Title

Phison PS3111-S11 Controller Firmware Missing Authentication on Vendor Unique Commands

Summary

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.

Severity

9.3 (Critical)


                        
                          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

8.2 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-02 13:03 UTC

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://trulycrisp.github.io/drivefirmware/phison_s11/	technical-description
https://github.com/trulycrisp/psychite	exploit
https://github.com/trulycrisp/disksec	exploit
https://www.vulncheck.com/advisories/phison-ps311…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
Phison Electronics Corporation	PS3111-S11 Controller Firmware	Affected: SBFQT1.3 (custom)	guessed

Date Public

2026-08-31 00:00

Credits

Michael Herbert

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-84696

Vulnerability from fkie_nvd - Published: 2026-09-02 01:17 - Updated: 2026-09-02 13:18

Severity

8.2 (High) - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/trulycrisp/disksec
	disclosure@vulncheck.com	https://github.com/trulycrisp/psychite
	disclosure@vulncheck.com	https://trulycrisp.github.io/drivefirmware/phison_s11/
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/phison-ps3111-s11-controller-firmware-missing-authentication-on-vendor-unique-commands

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "PS3111-S11 Controller Firmware",
          "vendor": "Phison Electronics Corporation",
          "versions": [
            {
              "status": "affected",
              "version": "SBFQT1.3",
              "versionType": "custom"
            }
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  ],
  "cveTags": [],
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  "id": "CVE-2026-84696",
  "lastModified": "2026-09-02T13:18:15.190",
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          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
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    "cvssMetricV40": [
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        "cvssData": {
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          "Recovery": "NOT_DEFINED",
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          "availabilityRequirement": "NOT_DEFINED",
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          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
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          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
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}

GHSA-P44M-VHP2-RRRF

Vulnerability from github – Published: 2026-09-02 03:31 – Updated: 2026-09-02 03:31

Details

Severity

8.2 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

9.3 (Critical)


                  
                    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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-84696"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-02T01:17:24Z",
    "severity": "CRITICAL"
  },
  "details": "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.",
  "id": "GHSA-p44m-vhp2-rrrf",
  "modified": "2026-09-02T03:31:11Z",
  "published": "2026-09-02T03:31:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84696"
    },
    {
      "type": "WEB",
      "url": "https://github.com/trulycrisp/disksec"
    },
    {
      "type": "WEB",
      "url": "https://github.com/trulycrisp/psychite"
    },
    {
      "type": "WEB",
      "url": "https://trulycrisp.github.io/drivefirmware/phison_s11"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/phison-ps3111-s11-controller-firmware-missing-authentication-on-vendor-unique-commands"
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  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-84696 (GCVE-0-2026-84696)

FKIE_CVE-2026-84696

GHSA-P44M-VHP2-RRRF

Tags

Sightings

Nomenclature