{"id":"CVE-2023-24955","published":"2023-05-09T18:15:13Z","modified":"2026-06-17T05:40:22Z","title":"Microsoft SharePoint Server Code Injection Vulnerability","vendor":"Microsoft","product":"SharePoint Server","tier":"core","eol":null,"description":{"text":"Microsoft SharePoint Server Remote Code Execution Vulnerability","provenance":"source","from":"NVD"},"summary":{"text":"Microsoft SharePoint Server contains a code injection flaw, classified as improper control of code generation, that enables remote code execution. An attacker who can reach the server over the network and holds high-privilege credentials can run arbitrary code on it, with no user interaction required.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T08:31:23Z"},"cvss":{"score":7.2,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.84974,"percentile":0.99711,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2024-03-26","dueDate":"2024-04-16","ransomware":true,"requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","notes":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24955;  https://nvd.nist.gov/vuln/detail/CVE-2023-24955","provenance":"source"},"vulncheckKev":{"dateAdded":"2024-03-26","exploitedFirstSeen":"2024-03-26","ransomware":true,"evidence":[{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2024-03-26"},{"url":"https://www.microsoft.com/en-us/security/blog/2025/04/09/stopping-attacks-against-on-premises-exchange-server-and-sharepoint-server-with-amsi/","date":"2025-04-09"},{"url":"https://www.rapid7.com/blog/post/dr-rapid7-q2-2025-incident-response-findings/","date":"2025-09-11"},{"url":"https://www.gstatic.com/security-marketing/m-trends-2026-en.pdf","date":"2026-03-23"},{"url":"https://securelist.com/global-report-security-services-2026/119233/","date":"2026-03-25"},{"url":"https://www.tenable.com/blog/cve-2026-32201-cve-2026-45659-cve-2026-56164-faq-sharepoint-server-exploitation","date":"2026-07-16"},{"url":"https://ctrlaltintel.com/research/government-open-directories/","date":"2026-09-13"}],"evidenceTotal":7,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24955","tags":["Patch","Vendor Advisory"]},{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24955","tags":["Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-24955","tags":["US Government Resource"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Remote exploitation of public-facing SharePoint server","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"Microsoft SharePoint Server Remote Code Execution Vulnerability","start":0,"end":63}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Yields arbitrary code execution on server","mappingType":"primary_impact","evidence":[{"from":"description","quote":"Microsoft SharePoint Server Remote Code Execution Vulnerability","start":0,"end":63}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2023-28942","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-28942","exploited":true,"exploitedSince":"2024-03-26","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2023-12-28","earliestUrl":"https://github.com/former-farmer/CVE-2023-24955-PoC","repos":[{"name":"former-farmer/CVE-2023-24955-PoC","url":"https://github.com/former-farmer/CVE-2023-24955-PoC","stars":13,"created":"2023-12-28"}]},"metasploit":[{"name":"Sharepoint Dynamic Proxy Generator Unauth RCE","module":"exploit/windows/http/sharepoint_dynamic_proxy_generator_auth_bypass_rce","type":"exploit","disclosureDate":"2023-05-01","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/sharepoint_dynamic_proxy_generator_auth_bypass_rce.rb"}],"first":{"date":"2023-05-01","source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/sharepoint_dynamic_proxy_generator_auth_bypass_rce.rb"},"provenance":"source"},"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"}],"timeline":[{"date":"2023-05-01","kind":"exploit-public","label":"First public exploit: Metasploit; later: PoC-in-GitHub 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exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-28942","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":"Metasploit","daysToKev":322},"priority":{"score":78.0,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 947 days ago"},{"name":"Known ransomware use","points":10.0,"detail":"CISA KEV and VulnCheck KEV: Known"},{"name":"EPSS percentile","points":19.94,"detail":"percentile 0.9971"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 PoC-in-GitHub repo; 1 Metasploit module"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":5.04,"detail":"base score 7.2"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]},"lineage":{"familyId":"fam-class-microsoft-sharepoint-cwe-94"}}