CVE-2023-24955 — Sharepoint Enterprise Server
HIGHCVE-2023-24955 is a high-severity (CVSS 7.2) Code Injection vulnerability in microsoft sharepoint enterprise server. It is in CISA's Known Exploited Vulnerabilities catalog (added 2024-03-26) and has been used in ransomware campaigns — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.
Microsoft SharePoint Server Remote Code Execution Vulnerability
Exploitation Status
Actively exploited in the wild
- Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2024-03-26 — including use in ransomware campaigns. Federal agencies were required to remediate by 2024-04-16.
- A successful exploit gives an attacker total control of the affected component, not partial access.
Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2023-24955.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2023-24955 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).
Where this sits among everything scored
Of 395,249 CVEs with a current EPSS score, this one falls in the 50–90% band (highlighted). Counts from FIRST.org, log-scaled.
Description
Microsoft SharePoint Server Remote Code Execution Vulnerability
Affected Products
sharepoint enterprise servermicrosoftsharepoint servermicrosoftResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Microsoft SharePoint Server Remote Code Execution Vulnerability
Microsoft SharePoint Server Remote Code Execution Vulnerability
Microsoft SharePoint Server Remote Code Execution Vulnerability
Microsoft SharePoint Server Remote Code Execution Vulnerability
Microsoft SharePoint Server Remote Code Execution Vulnerability
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every microsoft sharepoint enterprise server deployment and check each version against the affected-products list above.
Remediation status
No patch has shipped for CVE-2023-24955 yet — track the microsoft sharepoint enterprise server advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2023-24955 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.