CVE-2024-38024

This vulnerability is like a “malicious instruction” that could be smuggled into SharePoint so that the server ends up running attacker-controlled code. In practical terms, that can turn SharePoint into a starting point for taking over the server, planting malware, or reading/modifying stored files—especially if the attacker can reach the right SharePoint features.

This matters if you run Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition, or “sharepoint server” in general and you can expose it to users or systems you don’t fully control. Because the weakness requires higher privileges, it’s most relevant when attackers can reach SharePoint with substantial access (for example, through accounts or roles that can access affected functionality) rather than just anonymous visitors. Treat it as a risk mainly when SharePoint is reachable from the internet or from untrusted networks and an attacker can obtain the required level of access.

This is an AMBER issue because a public exploit is available and the expected likelihood of it being targeted is rising. While it requires higher privileges to trigger, the combination of weaponized code and remote impact means you should patch on an urgent schedule rather than waiting for the next maintenance window.

1. Confirm exposure (what you run)

   • Identify the exact SharePoint product/edition and its current build/version.
   • Record the build numbers and compare them to the fixed versions:
     • Microsoft SharePoint Enterprise Server 2016 → fixed in 16.0.5456.1000
     • Microsoft SharePoint Server 2019 → fixed in 16.0.10412.20001
     • Microsoft SharePoint Server Subscription Edition → fixed in 16.0.17328.20424

2. Check whether you are likely reachable with the needed access

   • Determine whether SharePoint is reachable from the internet or from partner/untrusted networks.
   • Review who can access SharePoint areas that require elevated permissions (since the vulnerability’s trigger requires higher privileges).

3. Patch (preferred remediation)

   • Use Microsoft’s official update guide for CVE-2024-38024: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38024
   • Install the recommended update(s) for your specific SharePoint edition.
   • After patching, verify the SharePoint build/version now matches (or is above) the fixed version for your edition.

4. Temporary workaround if you must delay patching

   • Reduce exposure by restricting access to SharePoint from the internet (allow-list trusted IPs where possible).
   • Minimize the number of accounts with high SharePoint privileges and immediately review any unusual accounts/roles.
   • Monitor for suspicious SharePoint activity (unexpected attempts around administrative or elevated functions), and tighten access until the fix is applied.

5. Ongoing monitoring

   • Confirm update status regularly and ensure no subsequent deployments or restore operations revert you to a vulnerable build.
   • Keep watch for new advisories related to CVE-2024-38024; this one is not in the CISA KEV list based on the provided findings.

Severity is high (CVSS 7.2) with remote network reachability and full impact categories noted in the baseline scoring; exploitation is remote and aims for confidentiality, integrity, and availability impact on the SharePoint server. The weakness is classified as CWE-502 (unsafe handling/deserialization), which commonly means a crafted input can be processed in an unsafe way to gain control of execution flow. The provided findings state a public exploit exists (weaponization available), but KEV (CISA Known Exploited Vulnerabilities) is not listed for this CVE, and no dated exploitation confirmation was provided here. EPSS is predicted as 45.5% with an upward trend, which indicates increasing attention; however, this is not the same as confirmed exploitation and should be treated as likelihood guidance. Patch availability is confirmed with fixed builds for SharePoint Server 2016, 2019, and Subscription Edition as listed in the PATCH findings.