CVE-2024-29059Known exploitationPublic exploitNetwork attack vector

Remote code execution via exposed ObjRef URI

Published Mar 22, 2024 · Updated Oct 21, 2025

Information disclosure in Microsoft .NET Framework allows remote attackers to obtain an ObjRef URI through HTTP .NET Remoting. The HTTP Remoting metadata handler processes a crafted request and returns a serialized ObjRef containing the object's unique URI and channel data. An exposed HTTP Remoting service is required; the leaked URI enables unauthenticated payload delivery to the remote object and remote code execution.

CVSS severity7.5
High
EPSS probability98.62%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Microsoft .NET Framework allows remote attackers to obtain an ObjRef URI through HTTP .NET Remoting. The HTTP Remoting metadata handler processes a crafted request and returns a serialized ObjRef containing the object's unique URI and channel data. An exposed HTTP Remoting service is required; the leaked URI enables unauthenticated payload delivery to the remote object and remote code execution.

The record

CVE
CVE-2024-29059
Published
Mar 22, 2024
Updated
Oct 21, 2025
Vendor
Microsoft
Product
Microsoft .NET Framework 3.5 and 4.8.1
Classifications
CWE-209, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 4, 2025Exploitation reportedCISA Known Exploited Vulnerabilities entry
  3. Oct 21, 2025Record 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 <4.8.09214.01

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 <4.8.09214.01
Microsoft · Microsoft .NET Framework 3.5 and 4.8version=4.8.0 <4.8.04690.02
Microsoft · Microsoft .NET Framework 2.0 Service Pack 2version=2.0.0 <3.0.50727.8976
Microsoft · Microsoft .NET Framework 3.0 Service Pack 2version=3.0.0 <3.0.50727.8976
Microsoft · Microsoft .NET Framework 3.5.1version=3.5.0 <3.0.30729.8959
Microsoft · Microsoft .NET Framework 3.5 and 4.7.2version=4.7.0 <4.7.04081.03
Microsoft · Microsoft .NET Frameworkversion=10.0.0 <10.0.10240.20402; version=4.7.0 <4.7.04081.03
Microsoft · Microsoft .NET Framework 4.6.2version=4.7.0 <4.7.04081.03
Microsoft · Microsoft .NET Framework 3.5version=3.5.0 <3.0.50727.8976
Microsoft · Microsoft .NET Framework 4.8version=4.8.0 <4.8.04690.02

Published CVSS scores

7.5MicrosoftCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A: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 IPsShadowserver observations through Sep 15, 2026. Gaps indicate unavailable data.
Sep 9, 2026Sep 15, 2026
View daily counts
Reporting dayUnique IPs
Sep 9, 2026Unavailable
Sep 10, 2026Unavailable
Sep 11, 2026Unavailable
Sep 12, 2026Unavailable
Sep 13, 2026Unavailable
Sep 14, 20265
Sep 15, 20269
Latest reporting daySep 15, 2026
Latest daily unique IPs9
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-209Generation of Error Message Containing Sensitive Information
T1190Exploit Public-Facing Application

Public exploit references

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

Reported exploitation

Technologies

Your stack

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Your stack

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