Vulnerability-Lookup

FKIE_CVE-2021-39306

Vulnerability from fkie_nvd - Published: 2021-12-22 19:15 - Updated: 2026-06-17 04:03

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

A stack buffer overflow was discovered on Realtek RTL8195AM device before 2.0.10, it exists in the client code when an attacker sends a big size Authentication challenge text in WEP security.

References

URL	Tags
cve@mitre.org	https://www.amebaiot.com/en/security_bulletin/cve-2021-39306/	Vendor Advisory
cve@mitre.org	https://www.realtek.com	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.amebaiot.com/en/security_bulletin/cve-2021-39306/	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.realtek.com	Vendor Advisory

Impacted products

	Vendor	Product	Version
	realtek	rtl8195am_firmware	*
	realtek	rtl8195am	-

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:realtek:rtl8195am_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "12003CE1-45D4-4F01-826B-32E6BACE742B",
              "versionEndExcluding": "2.0.10",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:realtek:rtl8195am:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "ABC12635-46E3-4595-A6AC-BD80F671B9D4",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A stack buffer overflow was discovered on Realtek RTL8195AM device before 2.0.10, it exists in the client code when an attacker sends a big size Authentication challenge text in WEP security."
    },
    {
      "lang": "es",
      "value": "Se ha detectado un desbordamiento del b\u00fafer de la pila en el dispositivo Realtek RTL8195AM versiones anteriores a 2.0.10, se presenta en el c\u00f3digo del cliente cuando un atacante env\u00eda un texto de desaf\u00edo de autenticaci\u00f3n de gran tama\u00f1o en la seguridad WEP"
    }
  ],
  "id": "CVE-2021-39306",
  "lastModified": "2026-06-17T04:03:30.830",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-12-22T19:15:11.373",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.amebaiot.com/en/security_bulletin/cve-2021-39306/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.realtek.com"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.amebaiot.com/en/security_bulletin/cve-2021-39306/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.realtek.com"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-39306 (GCVE-0-2021-39306)

Vulnerability from cvelistv5 – Published: 2021-12-22 18:08 – Updated: 2024-08-04 02:06

Summary

A stack buffer overflow was discovered on Realtek RTL8195AM device before 2.0.10, it exists in the client code when an attacker sends a big size Authentication challenge text in WEP security.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root Scorecard

References

2 references

URL	Tags
https://www.realtek.com	x_refsource_MISC
https://www.amebaiot.com/en/security_bulletin/cve…	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2024-08-04T02:06:41.543Z",
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              "x_transferred"
            ],
            "url": "https://www.realtek.com"
          },
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            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.amebaiot.com/en/security_bulletin/cve-2021-39306/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
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          "versions": [
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      ],
      "descriptions": [
        {
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          "value": "A stack buffer overflow was discovered on Realtek RTL8195AM device before 2.0.10, it exists in the client code when an attacker sends a big size Authentication challenge text in WEP security."
        }
      ],
      "problemTypes": [
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              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2021-12-22T18:08:42.000Z",
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        "shortName": "mitre"
      },
      "references": [
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          "url": "https://www.realtek.com"
        },
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          ],
          "url": "https://www.amebaiot.com/en/security_bulletin/cve-2021-39306/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-39306",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
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                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
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                      }
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        "references": {
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  "cveMetadata": {
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    "dateReserved": "2021-08-20T00:00:00.000Z",
    "dateUpdated": "2024-08-04T02:06:41.543Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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FKIE_CVE-2021-39306

CVE-2021-39306 (GCVE-0-2021-39306)

Tags

Sightings

Nomenclature

Related by attack behaviour