CVE-2024-43466Network attack vector

Authenticated service interruption via unsafe deserialization

Published Sep 10, 2024 · Updated Aug 10, 2026

Deserialization of untrusted data in Microsoft SharePoint Server 16.0 allows remote authenticated users to interrupt service. Microsoft identifies CWE-502 but has not disclosed the affected deserializer, accepted input format, or unsafe object operation. A low-privileged network account can reach the flaw without user interaction; the published impact is service interruption with no reported data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability4.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Deserialization of untrusted data in Microsoft SharePoint Server 16.0 allows remote authenticated users to interrupt service. Microsoft identifies CWE-502 but has not disclosed the affected deserializer, accepted input format, or unsafe object operation. A low-privileged network account can reach the flaw without user interaction; the published impact is service interruption with no reported data disclosure or modification.

The record

CVE
CVE-2024-43466
Published
Sep 10, 2024
Updated
Aug 10, 2026
Vendor
Microsoft
Product
Microsoft SharePoint Enterprise Server 2016
Classifications
CWE-502, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=16.0.0 <16.0.5465.1001

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Microsoft SharePoint Enterprise Server 2016version=16.0.0 <16.0.5465.1001
Microsoft · Microsoft SharePoint Server 2019version=16.0.0 <16.0.10414.20002
Microsoft · Microsoft SharePoint Server Subscription Editionversion=16.0.0 <16.0.17928.20086

Published CVSS scores

6.5Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1499Endpoint Denial of Service

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo