Vulnerability-Lookup

BDU:2026-07124 (CVE-2026-40397)

Vulnerability from fstec – Published: 2026-05-22 – Updated: 2026-05-22 – View on bdu.fstec.ru Fixed

Title

Уязвимость драйвера Windows Common Log File System Driver операционной системы Windows, позволяющая нарушителю повысить свои привилегии

Summary

Уязвимость драйвера Windows Common Log File System Driver операционной системы Windows связана с целочисленной потерей значимости. Эксплуатация уязвимости может позволить нарушителю повысить свои привилегии

Severity

6.8 (Medium) CVSS 2.0


                      
                        AV:L/AC:L/Au:S/C:C/I:C/A:C

7.8 (High) CVSS 3.1


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

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Data structure manipulation

Incidents

Being clarified

Remediation

Software update

CWE

CWE-191 - Целочисленная потеря значимости (простой или циклический сдвиг)

Aliases

CVE-2026-40397

References

1 reference

URL
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40397

Impacted products

21 products from 1 vendor

Vendors

Microsoft Corp

Products

Windows Server 2012 R2 (Server Core installation), Windows Server 2012 R2, Windows Server 2016 (Server Core installation), Windows Server 2016, Windows 10 1607, Windows 11 26H1, Windows Server 2025, Windows 11 24H2, Windows Server 2022, 23H2 Edition (Server Core installation), Windows 11 23H2, Windows 11 25H2, Windows Server 2025 (Server Core installation), Windows 10 22H2, Windows 10 21H2, Windows Server 2022 (Server Core installation), Windows Server 2019 (Server Core installation), Windows Server 2019, Windows 10 1809, Windows Server 2012, Windows Server 2012 (Server Core installation)

Versions

до 6.3.9600.23181 (Windows Server 2012 R2 (Server Core installation)), до 6.3.9600.23181 (Windows Server 2012 R2), до 10.0.14393.9140 (Windows Server 2016 (Server Core installation)), до 10.0.14393.9140 (Windows Server 2016), до 10.0.14393.9140 (Windows 10 1607), до 10.0.28000.2113 (Windows 11 26H1), до 10.0.26100.32860 (Windows Server 2025), до 10.0.26100.32772 (Windows Server 2025), до 10.0.26100.8457 (Windows 11 24H2), до 10.0.26100.8390 (Windows 11 24H2), до 10.0.25398.2330 (Windows Server 2022, 23H2 Edition (Server Core installation)), до 10.0.22631.7079 (Windows 11 23H2), до 10.0.26200.8457 (Windows 11 25H2), до 10.0.26200.8390 (Windows 11 25H2), до 10.0.26100.32860 (Windows Server 2025 (Server Core installation)), до 10.0.26100.32772 (Windows Server 2025 (Server Core installation)), до 10.0.19045.7291 (Windows 10 22H2), до 10.0.19044.7291 (Windows 10 21H2), до 10.0.20348.5139 (Windows Server 2022 (Server Core installation)), до 10.0.20348.5074 (Windows Server 2022 (Server Core installation)), до 10.0.20348.5139 (Windows Server 2022), до 10.0.20348.5074 (Windows Server 2022), до 10.0.17763.8755 (Windows Server 2019 (Server Core installation)), до 10.0.17763.8755 (Windows Server 2019), до 10.0.17763.8755 (Windows 10 1809), до 6.2.9200.26079 (Windows Server 2012), до 6.2.9200.26079 (Windows Server 2012 (Server Core installation))

Product types

Operating system

Platforms

Microsoft Corp Windows Server 2012 R2 (Server Core installation) до 6.3.9600.23181, Microsoft Corp Windows Server 2012 R2 до 6.3.9600.23181, Microsoft Corp Windows Server 2016 (Server Core installation) до 10.0.14393.9140, Microsoft Corp Windows Server 2016 до 10.0.14393.9140, Microsoft Corp Windows 10 1607 до 10.0.14393.9140 64-bit, Microsoft Corp Windows 10 1607 до 10.0.14393.9140 32-bit, Microsoft Corp Windows 11 26H1 до 10.0.28000.2113 ARM64, Microsoft Corp Windows 11 26H1 до 10.0.28000.2113 64-bit, Microsoft Corp Windows Server 2025 до 10.0.26100.32860, Microsoft Corp Windows Server 2025 до 10.0.26100.32772, Microsoft Corp Windows 11 24H2 до 10.0.26100.8457 64-bit, Microsoft Corp Windows 11 24H2 до 10.0.26100.8390 64-bit, Microsoft Corp Windows 11 24H2 до 10.0.26100.8457 ARM64, Microsoft Corp Windows 11 24H2 до 10.0.26100.8390 ARM64, Microsoft Corp Windows Server 2022, 23H2 Edition (Server Core installation) до 10.0.25398.2330, Microsoft Corp Windows 11 23H2 до 10.0.22631.7079 64-bit, Microsoft Corp Windows 11 23H2 до 10.0.22631.7079 ARM64, Microsoft Corp Windows 11 25H2 до 10.0.26200.8457 64-bit, Microsoft Corp Windows 11 25H2 до 10.0.26200.8390 64-bit, Microsoft Corp Windows 11 25H2 до 10.0.26200.8457 ARM64, Microsoft Corp Windows 11 25H2 до 10.0.26200.8390 ARM64, Microsoft Corp Windows Server 2025 (Server Core installation) до 10.0.26100.32860, Microsoft Corp Windows Server 2025 (Server Core installation) до 10.0.26100.32772, Microsoft Corp Windows 10 22H2 до 10.0.19045.7291 32-bit, Microsoft Corp Windows 10 22H2 до 10.0.19045.7291 ARM64, Microsoft Corp Windows 10 22H2 до 10.0.19045.7291 64-bit, Microsoft Corp Windows 10 21H2 до 10.0.19044.7291 64-bit, Microsoft Corp Windows 10 21H2 до 10.0.19044.7291 ARM64, Microsoft Corp Windows 10 21H2 до 10.0.19044.7291 32-bit, Microsoft Corp Windows Server 2022 (Server Core installation) до 10.0.20348.5139, Microsoft Corp Windows Server 2022 (Server Core installation) до 10.0.20348.5074, Microsoft Corp Windows Server 2022 до 10.0.20348.5139, Microsoft Corp Windows Server 2022 до 10.0.20348.5074, Microsoft Corp Windows Server 2019 (Server Core installation) до 10.0.17763.8755, Microsoft Corp Windows Server 2019 до 10.0.17763.8755, Microsoft Corp Windows 10 1809 до 10.0.17763.8755 64-bit, Microsoft Corp Windows 10 1809 до 10.0.17763.8755 32-bit, Microsoft Corp Windows Server 2012 до 6.2.9200.26079, Microsoft Corp Windows Server 2012 (Server Core installation) до 6.2.9200.26079

Mitigations

Использование рекомендаций производителя: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40397

Remediation

TO2702 Накопительное обновление для Windows Server 2019 для x64 систем (KB5087538), TO2703 Накопительное обновление для Windows 11 24H2 для x64 систем (KB5089549), TO2704 Накопительное обновление для Windows Server 2022 21H2 для x64 систем (KB5087545), TO2773 Накопительное обновление для Windows 10 21H2 для x64 систем (KB5087544)

JSON

To clipboard

{
  "CVSS 2.0": "AV:L/AC:L/Au:S/C:C/I:C/A:C",
  "CVSS 3.0": "AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "TO2702, TO2703, TO2704, TO2773",
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": "TO2702 \u041d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u0434\u043b\u044f Windows Server 2019 \u0434\u043b\u044f x64 \u0441\u0438\u0441\u0442\u0435\u043c (KB5087538), TO2703 \u041d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u0434\u043b\u044f Windows 11 24H2 \u0434\u043b\u044f x64 \u0441\u0438\u0441\u0442\u0435\u043c (KB5089549), TO2704 \u041d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u0434\u043b\u044f Windows Server 2022 21H2 \u0434\u043b\u044f x64 \u0441\u0438\u0441\u0442\u0435\u043c (KB5087545), TO2773 \u041d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u0434\u043b\u044f Windows 10 21H2 \u0434\u043b\u044f x64 \u0441\u0438\u0441\u0442\u0435\u043c (KB5087544)",
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Microsoft Corp",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "\u0434\u043e 6.3.9600.23181 (Windows Server 2012 R2 (Server Core installation)), \u0434\u043e 6.3.9600.23181 (Windows Server 2012 R2), \u0434\u043e 10.0.14393.9140 (Windows Server 2016 (Server Core installation)), \u0434\u043e 10.0.14393.9140 (Windows Server 2016), \u0434\u043e 10.0.14393.9140 (Windows 10 1607), \u0434\u043e 10.0.28000.2113 (Windows 11 26H1), \u0434\u043e 10.0.26100.32860 (Windows Server 2025), \u0434\u043e 10.0.26100.32772 (Windows Server 2025), \u0434\u043e 10.0.26100.8457 (Windows 11 24H2), \u0434\u043e 10.0.26100.8390 (Windows 11 24H2), \u0434\u043e 10.0.25398.2330 (Windows Server 2022, 23H2 Edition (Server Core installation)), \u0434\u043e 10.0.22631.7079 (Windows 11 23H2), \u0434\u043e 10.0.26200.8457 (Windows 11 25H2), \u0434\u043e 10.0.26200.8390 (Windows 11 25H2), \u0434\u043e 10.0.26100.32860 (Windows Server 2025 (Server Core installation)), \u0434\u043e 10.0.26100.32772 (Windows Server 2025 (Server Core installation)), \u0434\u043e 10.0.19045.7291 (Windows 10 22H2), \u0434\u043e 10.0.19044.7291 (Windows 10 21H2), \u0434\u043e 10.0.20348.5139 (Windows Server 2022 (Server Core installation)), \u0434\u043e 10.0.20348.5074 (Windows Server 2022 (Server Core installation)), \u0434\u043e 10.0.20348.5139 (Windows Server 2022), \u0434\u043e 10.0.20348.5074 (Windows Server 2022), \u0434\u043e 10.0.17763.8755 (Windows Server 2019 (Server Core installation)), \u0434\u043e 10.0.17763.8755 (Windows Server 2019), \u0434\u043e 10.0.17763.8755 (Windows 10 1809), \u0434\u043e 6.2.9200.26079 (Windows Server 2012), \u0434\u043e 6.2.9200.26079 (Windows Server 2012 (Server Core installation))",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f:\nhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40397",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "12.05.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "22.05.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "22.05.2026",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2026-07124",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2026-40397",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "Windows Server 2012 R2 (Server Core installation), Windows Server 2012 R2, Windows Server 2016 (Server Core installation), Windows Server 2016, Windows 10 1607, Windows 11 26H1, Windows Server 2025, Windows 11 24H2, Windows Server 2022, 23H2 Edition (Server Core installation), Windows 11 23H2, Windows 11 25H2, Windows Server 2025 (Server Core installation), Windows 10 22H2, Windows 10 21H2, Windows Server 2022 (Server Core installation), Windows Server 2022, Windows Server 2019 (Server Core installation), Windows Server 2019, Windows 10 1809, Windows Server 2012, Windows Server 2012 (Server Core installation)",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": "Microsoft Corp Windows Server 2012 R2 (Server Core installation) \u0434\u043e 6.3.9600.23181 , Microsoft Corp Windows Server 2012 R2 \u0434\u043e 6.3.9600.23181 , Microsoft Corp Windows Server 2016 (Server Core installation) \u0434\u043e 10.0.14393.9140 , Microsoft Corp Windows Server 2016 \u0434\u043e 10.0.14393.9140 , Microsoft Corp Windows 10 1607 \u0434\u043e 10.0.14393.9140 64-bit, Microsoft Corp Windows 10 1607 \u0434\u043e 10.0.14393.9140 32-bit, Microsoft Corp Windows 11 26H1 \u0434\u043e 10.0.28000.2113 ARM64, Microsoft Corp Windows 11 26H1 \u0434\u043e 10.0.28000.2113 64-bit, Microsoft Corp Windows Server 2025 \u0434\u043e 10.0.26100.32860 , Microsoft Corp Windows Server 2025 \u0434\u043e 10.0.26100.32772 , Microsoft Corp Windows 11 24H2 \u0434\u043e 10.0.26100.8457 64-bit, Microsoft Corp Windows 11 24H2 \u0434\u043e 10.0.26100.8390 64-bit, Microsoft Corp Windows 11 24H2 \u0434\u043e 10.0.26100.8457 ARM64, Microsoft Corp Windows 11 24H2 \u0434\u043e 10.0.26100.8390 ARM64, Microsoft Corp Windows Server 2022, 23H2 Edition (Server Core installation) \u0434\u043e 10.0.25398.2330 , Microsoft Corp Windows 11 23H2 \u0434\u043e 10.0.22631.7079 64-bit, Microsoft Corp Windows 11 23H2 \u0434\u043e 10.0.22631.7079 ARM64, Microsoft Corp Windows 11 25H2 \u0434\u043e 10.0.26200.8457 64-bit, Microsoft Corp Windows 11 25H2 \u0434\u043e 10.0.26200.8390 64-bit, Microsoft Corp Windows 11 25H2 \u0434\u043e 10.0.26200.8457 ARM64, Microsoft Corp Windows 11 25H2 \u0434\u043e 10.0.26200.8390 ARM64, Microsoft Corp Windows Server 2025 (Server Core installation) \u0434\u043e 10.0.26100.32860 , Microsoft Corp Windows Server 2025 (Server Core installation) \u0434\u043e 10.0.26100.32772 , Microsoft Corp Windows 10 22H2 \u0434\u043e 10.0.19045.7291 32-bit, Microsoft Corp Windows 10 22H2 \u0434\u043e 10.0.19045.7291 ARM64, Microsoft Corp Windows 10 22H2 \u0434\u043e 10.0.19045.7291 64-bit, Microsoft Corp Windows 10 21H2 \u0434\u043e 10.0.19044.7291 64-bit, Microsoft Corp Windows 10 21H2 \u0434\u043e 10.0.19044.7291 ARM64, Microsoft Corp Windows 10 21H2 \u0434\u043e 10.0.19044.7291 32-bit, Microsoft Corp Windows Server 2022 (Server Core installation) \u0434\u043e 10.0.20348.5139 , Microsoft Corp Windows Server 2022 (Server Core installation) \u0434\u043e 10.0.20348.5074 , Microsoft Corp Windows Server 2022 \u0434\u043e 10.0.20348.5139 , Microsoft Corp Windows Server 2022 \u0434\u043e 10.0.20348.5074 , Microsoft Corp Windows Server 2019 (Server Core installation) \u0434\u043e 10.0.17763.8755 , Microsoft Corp Windows Server 2019 \u0434\u043e 10.0.17763.8755 , Microsoft Corp Windows 10 1809 \u0434\u043e 10.0.17763.8755 64-bit, Microsoft Corp Windows 10 1809 \u0434\u043e 10.0.17763.8755 32-bit, Microsoft Corp Windows Server 2012 \u0434\u043e 6.2.9200.26079 , Microsoft Corp Windows Server 2012 (Server Core installation) \u0434\u043e 6.2.9200.26079 ",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 Windows Common Log File System Driver \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Windows, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u0426\u0435\u043b\u043e\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u0430\u044f \u043f\u043e\u0442\u0435\u0440\u044f \u0437\u043d\u0430\u0447\u0438\u043c\u043e\u0441\u0442\u0438 (\u043f\u0440\u043e\u0441\u0442\u043e\u0439 \u0438\u043b\u0438 \u0446\u0438\u043a\u043b\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0441\u0434\u0432\u0438\u0433) (CWE-191)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 Windows Common Log File System Driver \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Windows \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u0446\u0435\u043b\u043e\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u043e\u0439 \u043f\u043e\u0442\u0435\u0440\u0435\u0439 \u0437\u043d\u0430\u0447\u0438\u043c\u043e\u0441\u0442\u0438. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0430\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u0445",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40397",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u0430\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-191",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 6,8)\n\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.1 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 7,8)"
}

CVE-2026-40397 (GCVE-0-2026-40397)

Vulnerability from cvelistv5 – Published: 2026-05-12 16:59 – Updated: 2026-08-10 15:13

Title

Windows Common Log File System Driver Elevation of Privilege Vulnerability

Summary

Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-13 03:57 UTC

CWE

CWE-191 - Integer Underflow (Wrap or Wraparound)

Assigner

microsoft CNA under the mitre root

CNA scorecard B 82/100 over 3957 records in the last 180 days details

References

1 reference

URL	Tags
https://msrc.microsoft.com/update-guide/vulnerabi…	vendor-advisorypatch

Impacted products

21 products

Vendor	Product	Version
Microsoft	Windows 10 Version 1607	Affected: 10.0.14393.0 , < 10.0.14393.9140 (custom)
Microsoft	Windows 10 Version 1809	Affected: 10.0.17763.0 , < 10.0.17763.8755 (custom)
Microsoft	Windows 10 Version 21H2	Affected: 10.0.19044.0 , < 10.0.19044.7291 (custom)
Microsoft	Windows 10 Version 22H2	Affected: 10.0.19045.0 , < 10.0.19045.7417 (custom)
Microsoft	Windows 11 version 23H2	Affected: 10.0.22631.0 , < 10.0.22631.7079 (custom)
Microsoft	Windows 11 Version 23H2	Affected: 10.0.22631.0 , < 10.0.22631.7219 (custom)
Microsoft	Windows 11 Version 24H2	Affected: 10.0.26100.0 , < 10.0.26100.8457 (custom)
Microsoft	Windows 11 Version 25H2	Affected: 10.0.26200.0 , < 10.0.26200.8457 (custom)
Microsoft	Windows 11 version 26H1	Affected: 10.0.28000.0 , < 10.0.28000.2113 (custom)
Microsoft	Windows Server 2012	Affected: 6.2.9200.0 , < 6.2.9200.26079 (custom)
Microsoft	Windows Server 2012 (Server Core installation)	Affected: 6.2.9200.0 , < 6.2.9200.26079 (custom)
Microsoft	Windows Server 2012 R2	Affected: 6.3.9600.0 , < 6.3.9600.23181 (custom)
Microsoft	Windows Server 2012 R2 (Server Core installation)	Affected: 6.3.9600.0 , < 6.3.9600.23181 (custom)
Microsoft	Windows Server 2016	Affected: 10.0.14393.0 , < 10.0.14393.9140 (custom)
Microsoft	Windows Server 2016 (Server Core installation)	Affected: 10.0.14393.0 , < 10.0.14393.9140 (custom)
Microsoft	Windows Server 2019	Affected: 10.0.17763.0 , < 10.0.17763.8755 (custom)
Microsoft	Windows Server 2019 (Server Core installation)	Affected: 10.0.17763.0 , < 10.0.17763.8755 (custom)
Microsoft	Windows Server 2022	Affected: 10.0.20348.0 , < 10.0.20348.5139 (custom)
Microsoft	Windows Server 2022, 23H2 Edition (Server Core installation)	Affected: 10.0.25398.0 , < 10.0.25398.2330 (custom)
Microsoft	Windows Server 2025	Affected: 10.0.26100.0 , < 10.0.26100.32860 (custom)
Microsoft	Windows Server 2025 (Server Core installation)	Affected: 10.0.26100.0 , < 10.0.26100.32860 (custom)

Date Public

2026-05-12 14:00

Show details on NVD website

JSON

To clipboard

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      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-10T15:13:31.964Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Common Log File System Driver Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40397"
        }
      ],
      "title": "Windows Common Log File System Driver Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-40397",
    "datePublished": "2026-05-12T16:59:23.158Z",
    "dateReserved": "2026-04-13T00:27:50.797Z",
    "dateUpdated": "2026-08-10T15:13:31.964Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.

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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