CVE-2026-45657 (GCVE-0-2026-45657)

Vulnerability from cvelistv5 – Published: 2026-06-09 17:04 – Updated: 2026-08-25 22:43
VLAI
Title
Windows Kernel Remote Code Execution Vulnerability
Summary
Use after free in Windows Kernel allows an unauthorized attacker to execute code over a network.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 03:56 UTC
CWE
References
Impacted products
Vendor Product Version CPE status
Microsoft Windows 11 version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.7219 (custom)
guessed Create a notification for this product.
Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.7219 (custom)
guessed Create a notification for this product.
Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.8655 (custom)
guessed Create a notification for this product.
Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.8655 (custom)
guessed Create a notification for this product.
Microsoft Windows 11 version 26H1 Affected: 10.0.28000.0 , < 10.0.28000.2269 (custom)
guessed Create a notification for this product.
Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.5256 (custom)
guessed Create a notification for this product.
Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32995 (custom)
guessed Create a notification for this product.
Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32995 (custom)
guessed Create a notification for this product.
Date Public
2026-06-09 14:00
Show details on NVD website

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              "value": "Use after free in Windows Kernel allows an unauthorized attacker to execute code over a network."
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                  "lang": "en-US",
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                  "description": "CWE-122: Heap-based Buffer Overflow",
                  "lang": "en-US",
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          "providerMetadata": {
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            "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
            "shortName": "microsoft"
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            }
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        "cveId": "CVE-2026-45657",
        "datePublished": "2026-06-09T17:04:56.833Z",
        "dateReserved": "2026-05-12T20:33:35.158Z",
        "dateUpdated": "2026-08-25T22:43:20.403Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

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.

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Detection rules are retrieved from Rulezet.

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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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