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CVE-2020-26143 (GCVE-0-2020-26143)

Vulnerability from cvelistv5 – Published: 2021-05-11 19:36 – Updated: 2026-04-14 08:49
VLAI
Summary
An issue was discovered in the ALFA Windows 10 driver 1030.36.604 for AWUS036ACH. The WEP, WPA, WPA2, and WPA3 implementations accept fragmented plaintext frames in a protected Wi-Fi network. An adversary can abuse this to inject arbitrary data frames independent of the network configuration.
CWE
  • n/a
Impacted products
Vendor Product Version CPE status
Siemens SCALANCE W721-1 RJ45 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W722-1 RJ45 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W734-1 RJ45 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W734-1 RJ45 (USA) Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W738-1 M12 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W748-1 M12 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W748-1 RJ45 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W761-1 RJ45 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W774-1 M12 EEC Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W774-1 RJ45 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W774-1 RJ45 (USA) Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W778-1 M12 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W778-1 M12 EEC Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W778-1 M12 EEC (USA) Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W786-1 RJ45 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W786-2 RJ45 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W786-2 SFP Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W786-2IA RJ45 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W788-1 M12 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W788-1 RJ45 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W788-2 M12 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W788-2 M12 EEC Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Siemens SCALANCE W788-2 RJ45 Affected: 0 , < V6.6.0 (custom)
guessed Create a notification for this product.
Show details on NVD website

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            "name": "20210511 Multiple Vulnerabilities in Frame Aggregation and Fragmentation Implementations of 802.11 Specification Affecting Cisco Products: May 2021",
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      "id": "CVE-2020-26143",
      "lastModified": "2024-11-21T05:19:21.450",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N\", \"baseScore\": 6.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"ADJACENT_NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 2.8, \"impactScore\": 3.6}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:A/AC:L/Au:N/C:N/I:P/A:N\", \"baseScore\": 3.3, \"accessVector\": \"ADJACENT_NETWORK\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"PARTIAL\", \"availabilityImpact\": \"NONE\"}, \"baseSeverity\": \"LOW\", \"exploitabilityScore\": 6.5, \"impactScore\": 2.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2021-05-11T20:15:08.800",
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      "sourceIdentifier": "cve@mitre.org",
      "vulnStatus": "Modified",
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    },
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Advisory\"]},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-019200.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-913875.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T11:48:14+00:00",
      "cve": "CVE-2020-26143",
      "id": "CVE-2020-26143",
      "initial_release_date": "2020-01-01T00:00:00+00:00",
      "product_status:fixed": "150",
      "product_status:known_affected": "44",
      "product_status:known_not_affected": "106",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: accepting fragmented plaintext frames in protected networks",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-26143.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-31T02:16:45Z",
      "cve": "CVE-2020-26143",
      "id": "CVE-2020-26143",
      "initial_release_date": "2023-02-15T03:53:21Z",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "174",
      "product_status:recommended": "20",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2020-26143",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-26143.json",
      "version": "17"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.
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  • 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.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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