{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/sharepoint-server-2016/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["SharePoint Server 2016","SharePoint Server 2019","SharePoint"],"_cs_severities":["high"],"_cs_tags":["sharepoint","rce","code_execution"],"_cs_type":"advisory","_cs_vendors":["Microsoft"],"content_html":"\u003cp\u003eMicrosoft SharePoint Server 2016, 2019, and SharePoint are vulnerable to a remote code execution (RCE) attack. An authenticated attacker can exploit this vulnerability to execute arbitrary code within the context of the SharePoint application. The vulnerability impacts organizations utilizing these versions of SharePoint server and could lead to data compromise, system takeover, and further malicious activities within the network. Successful exploitation allows the attacker to gain control over the SharePoint server, potentially impacting sensitive data and business operations. Defenders need to implement detection and patching strategies to mitigate this risk.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker authenticates to the SharePoint server using compromised or valid credentials.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious request targeting a vulnerable endpoint within SharePoint.\u003c/li\u003e\n\u003cli\u003eThis request exploits a flaw that allows for arbitrary code execution, such as deserialization or improper input validation.\u003c/li\u003e\n\u003cli\u003eThe server processes the malicious request, triggering the vulnerability.\u003c/li\u003e\n\u003cli\u003eThe attacker injects and executes arbitrary code on the SharePoint server.\u003c/li\u003e\n\u003cli\u003eThis code could install a web shell for persistent access.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages the web shell or other remote access to move laterally within the network.\u003c/li\u003e\n\u003cli\u003eThe attacker compromises sensitive data or other critical systems.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this vulnerability allows an attacker to execute arbitrary code on the SharePoint server. This could lead to the complete compromise of the server, including access to sensitive data stored within SharePoint, modification of SharePoint content, and the potential for lateral movement to other systems on the network. The number of affected organizations is potentially large, given the widespread use of SharePoint.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor SharePoint servers for suspicious activity, including unusual requests and unauthorized access attempts.\u003c/li\u003e\n\u003cli\u003eExamine web server logs for POST requests with unusual parameters or content.\u003c/li\u003e\n\u003cli\u003eImplement the Sigma rules provided to detect potential exploitation attempts.\u003c/li\u003e\n\u003cli\u003eApply patches released by Microsoft as soon as they are available to remediate the vulnerability.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-26T12:20:01Z","date_published":"2026-05-26T12:20:01Z","id":"https://feed.craftedsignal.io/briefs/2026-05-sharepoint-rce/","summary":"An authenticated remote attacker can exploit a vulnerability in Microsoft SharePoint Server 2016, Microsoft SharePoint Server 2019, and Microsoft SharePoint to execute arbitrary code.","title":"Microsoft SharePoint Server RCE Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-05-sharepoint-rce/"}],"language":"en","title":"CraftedSignal Threat Feed — SharePoint Server 2016","version":"https://jsonfeed.org/version/1.1"}