Vulnerability-Lookup

CVE-2026-19398 (GCVE-0-2026-19398)

Vulnerability from cvelistv5 – Published: 2026-08-27 02:00 – Updated: 2026-08-27 14:50

Summary

“unsupported-when-assigned.” An out-of-bounds write in the SmiFlash SMM module of ASUS FA507NU and FA507NV BIOS allows a local administrator to cause a system crash (BSOD) or BIOS corruption via a crafted software SMI (SW SMI) request with an oversized length value.Refer to the ' Security Update for ASUS FA507NV / FA507NU BIOS ' section on the ASUS Security Advisory for more information.

Severity

6.8 (Medium)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-27 14:50 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

ASUS icscert root

References

1 reference

URL	Tags
https://www.asus.com/security-advisory

Impacted products

2 products

Vendor	Product	Version	CPE status
ASUS	FA507NV	Affected: 318 (custom) cpe:2.3:a:asus:fa507nv:318:::::::*
ASUS	FA507NU	Affected: 318 cpe:2.3:a:asus:fa507nu:318:::::::*

Credits

hex2mem

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-19398

Vulnerability from fkie_nvd - Published: 2026-08-27 02:16 - Updated: 2026-08-27 17:17

Severity

6.8 (Medium) - CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	54bf65a7-a193-42d2-b1ba-8e150d3c35e1	https://www.asus.com/security-advisory

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
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    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "FA507NV",
          "vendor": "ASUS",
          "versions": [
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              "status": "affected",
              "version": "318",
              "versionType": "custom"
            }
          ]
        },
        {
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          "product": "FA507NU",
          "vendor": "ASUS",
          "versions": [
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            }
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        }
      ],
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    }
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    }
  ],
  "id": "CVE-2026-19398",
  "lastModified": "2026-08-27T17:17:36.177",
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          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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GHSA-MQCP-4543-826G

Vulnerability from github – Published: 2026-08-27 03:32 – Updated: 2026-08-27 03:32

Details

Severity

6.8 (Medium)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-19398"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-27T02:16:27Z",
    "severity": "MODERATE"
  },
  "details": "\u201cunsupported-when-assigned.\u201d An out-of-bounds write in the SmiFlash SMM module of ASUS FA507NU and FA507NV BIOS allows a local\u00a0 administrator to cause a system crash (BSOD) or BIOS corruption via a crafted software SMI (SW SMI) request with an oversized length value.Refer to the \u0027\u00a0\nSecurity Update for ASUS FA507NV / FA507NU BIOS\u00a0\u00a0\u00a0\u0027 section on the ASUS Security Advisory for more information.",
  "id": "GHSA-mqcp-4543-826g",
  "modified": "2026-08-27T03:32:58Z",
  "published": "2026-08-27T03:32:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19398"
    },
    {
      "type": "WEB",
      "url": "https://www.asus.com/security-advisory"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/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-2026-19398 (GCVE-0-2026-19398)

FKIE_CVE-2026-19398

GHSA-MQCP-4543-826G

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Nomenclature