CVE-2023-24955
KEVRansomware UseMicrosoft SharePoint Server Code Injection Vulnerability
Description
Microsoft SharePoint Server contains a code injection vulnerability that allows an authenticated attacker with Site Owner privileges to execute code remotely.
Microsoft SharePoint Server Remote Code Execution Vulnerability
CVSS 3.1 vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HPublishedMay 9, 2023
Last modifiedJun 17, 2026
Added to KEVMar 26, 2024
Remediation dueApr 16, 2024
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24955PatchVendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-24955US Government Resource
0 recent articles mention this CVE
84
Risk assessment · Critical
Actively exploited and used by ransomware crews. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 924 days
- Ransomware
- Used in known ransomware campaigns
- CVSS
- 7.2 HIGH
- EPSS (30-day exploit probability)
- 85.0% · top 1% of all CVEs
- Weakness
- CWE-94
- Attack vector
- Network, remotely reachable
Recommended actions
- 1.Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
- 5.Verify offline/immutable backups and segment the affected systems. This flaw is used for ransomware initial access.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.