CVE-2024-43484Network attack vector

Service interruption via algorithmically complex package processing

Published Oct 8, 2024 · Updated Aug 19, 2026

Denial of service in System.IO.Packaging across affected Microsoft .NET products allows remote attackers to interrupt applications via crafted input. The library lets untrusted input drive algorithmically complex operations that consume excessive processing resources. Exploitation requires an application to process attacker-controlled packaging data; the published impact is service interruption without data disclosure or modification.

CVSS severity7.5
High
EPSS probability2.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in System.IO.Packaging across affected Microsoft .NET products allows remote attackers to interrupt applications via crafted input. The library lets untrusted input drive algorithmically complex operations that consume excessive processing resources. Exploitation requires an application to process attacker-controlled packaging data; the published impact is service interruption without data disclosure or modification.

The record

CVE
CVE-2024-43484
Published
Oct 8, 2024
Updated
Aug 19, 2026
Vendor
Microsoft
Product
Microsoft .NET Framework 3.5 and 4.8.1
Classifications
CWE-789, CWE-407, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 8, 2024CVE publishedPublication date reported by the CVE source.
  2. 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.

  1. Affected versionversion=4.8.1 <4.8.1.9277.03

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft .NET Framework 3.5 and 4.8.1version=4.8.1 <4.8.1.9277.03
Microsoft · .NET 6.0version=6.0.0 <6.0.35
Microsoft · Microsoft .NET Framework 3.5 and 4.8version=4.8.0 <4.8.04762.01
Microsoft · Microsoft Visual Studio 2022 version 17.10version=17.10 <17.10.8
Microsoft · Microsoft Visual Studio 2022 version 17.8version=17.8.0 <17.8.15
Microsoft · Microsoft Visual Studio 2022 version 17.6version=17.6.0 <17.6.20
Microsoft · .NET 8.0version=8.0.0 <8.0.10
Microsoft · Microsoft .NET Framework 2.0 Service Pack 2version=2.0.0 <3.0.30729.8974
Microsoft · Microsoft Visual Studio 2022 version 17.11version=17.11 <17.11.5
Microsoft · Microsoft .NET Framework 3.0 Service Pack 2version=3.0.0 <3.0.30729.8974
Microsoft · Microsoft .NET Framework 3.5.1version=3.5.0 <3.5.1.30729.8974
Microsoft · Microsoft .NET Framework 3.5 and 4.7.2version=4.7.0 <4.7.04115.01
Microsoft · Microsoft .NET Frameworkversion=10.0.0.0 <10.0.10240.20796; version=4.7.0 <4.7.04115.01
Microsoft · PowerShell 7.2version=7.2.0 <7.2.24
Microsoft · PowerShell 7.4version=7.4.0 <7.4.6
Microsoft · Microsoft .NET Framework 4.6.2version=4.7.0 <4.7.04115.01
Microsoft · Microsoft .NET Framework 3.5version=3.5.0 <3.5.30729.8973
Microsoft · Microsoft .NET Framework 4.8version=4.8.0 <4.8.04762.01

Published CVSS scores

7.5MicrosoftCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.8GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-789Memory Allocation with Excessive Size Value
CWE-407Inefficient Algorithmic Complexity
T1499.004Application or System Exploitation

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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