CVE-2024-37978

Secure Boot bypass via undisclosed stack overflow

Published Jul 9, 2024 · Updated Feb 10, 2026

Stack-based buffer overflow in Secure Boot in affected Microsoft Windows builds allows context-dependent attackers to bypass boot-chain verification. Microsoft has not published the affected function, input format, or unsafe stack operation beyond the CWE mapping. Exploitation requires adjacent access and user interaction; a successful bypass permits untrusted boot components to run before Windows establishes its trusted chain.

CVSS severity8.0
High
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Secure Boot in affected Microsoft Windows builds allows context-dependent attackers to bypass boot-chain verification. Microsoft has not published the affected function, input format, or unsafe stack operation beyond the CWE mapping. Exploitation requires adjacent access and user interaction; a successful bypass permits untrusted boot components to run before Windows establishes its trusted chain.

The record

CVE
CVE-2024-37978
Published
Jul 9, 2024
Updated
Feb 10, 2026
Vendor
Microsoft
Product
Windows Server 2022, 23H2 Edition (Server Core installation)
Classifications
CWE-121, T1542.003
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.25398.0 <10.0.25398.1009

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.1009
Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.3880
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.3880
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.3880

Published CVSS scores

8.0Microsoft CorporationCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1542.003Bootkit

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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