HTTP: Microsoft Windows NTFS LFS NtfsCheckRestartTable Heap Buffer Overflow

This signature detects attempts to exploit a known vulnerability against Microsoft Windows NTFS LFS. A successful attack can lead to a buffer overflow and arbitrary remote code execution within the context of the Microsoft Windows NTFS LFS.

References

CVE: CVE-2026-20840

Short Name
HTTP:STC:WIN-NTFSCHECKTABLE-BO
Severity
Major
Recommended
True
Recommended Action
Drop
Category
HTTP
Keywords
Buffer CVE-2026-20840 Heap LFS Microsoft NTFS NtfsCheckRestartTable Overflow Windows
Release Date
04/09/2026
Supported Platforms

mx-19.3

vmx-19.3

vsrx-19.2

srx-19.3

srx-branch-19.3

vsrx3bsd-19.2

srx-19.4

vsrx3bsd-19.4

srx-branch-19.4

vsrx-19.4

vmx-19.4

mx-19.4

srxevo-25.4

vsrx-26.2

srx-26.2

srx-branch-26.2

vsrx3bsd-26.2

mx-12.3

srx-12.3

srx-branch-12.3

vsrx-12.3

Sigpack Version
3898
False Positive
Unknown

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