CVE-2024-43523

Physical code execution via heap overflow

Published Oct 8, 2024 · Updated Aug 19, 2026

Heap-based buffer overflow in Microsoft's Windows Mobile Broadband Driver allows physically proximate attackers to execute arbitrary code. The driver inadequately validates attacker-controlled input, and its subsequent processing writes beyond a heap allocation. Physical access is required; Microsoft has not disclosed the input format or transport needed to reach the faulty path.

CVSS severity6.8

Medium

EPSS probability0.67%

Next 30 days · Sep 16, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

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Summary

What happened

The record

CVE: CVE-2024-43523
Published: Oct 8, 2024
Updated: Aug 19, 2026

Vendor: Microsoft
Product: Windows Server 2019
Classifications: CWE-122, CWE-20, T1203

Attack vector: physical
Privileges: unauthenticated

Timeline

How it unfolded

Oct 8, 2024CVE publishedPublication date reported by the CVE source.
Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

Affected versionversion=10.0.17763.0 <10.0.17763.6414

What conditions does exploitation require?

Attack vectorphysical

Required privilegesunauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.6414

Microsoft · Windows 11, version 24H2version=10.0.26100.0 <10.0.26100.2033

Microsoft · Windows 11 version 21H2version=10.0.22000.0 <10.0.22000.3260

Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.5011

Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.1189

Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.4317

Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.5011

Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.6414

Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.4317

Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.4317

Microsoft · Windows 10 Version 1809version=10.0.17763.0 <10.0.17763.6414

Published CVSS scores

6.8MicrosoftCVSS:3.1/AV:P/AC:L/PR:N/UI:N/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)

Vectorphysical

Privilegesunauthenticated

Known exploitationUnconfirmed

Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow

CWE-20Improper Input Validation

T1203Exploitation for Client Execution

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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