{"answers":{"affected":"It affects 1 product.","exploited":"Yes. Attackers have exploited CVE-2026-56164 in the wild since at least 14 Jul 2026.","fix":"No fix has been published for CVE-2026-56164 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Jul 2026.","what":"CVE-2026-56164 is a medium-severity missing authorization vulnerability in Microsoft Sharepoint Server, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-56164 and fix it if it is affected.\n\nWhat it is: CVE-2026-56164 is a medium-severity missing authorization vulnerability in Microsoft Sharepoint Server, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2026-56164 in the wild since at least 14 Jul 2026.\n\nAffected product: Microsoft Sharepoint Server. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-56164/ (Markdown: https://insights.sbomify.com/CVE-2026-56164/index.md)","id":"CVE-2026-56164","markdown":"https://insights.sbomify.com/CVE-2026-56164/index.md","name":"CVE-2026-56164","record":{"aliases":["GHSA-hc2f-r46j-4w6x"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"SharePoint Server","requires_auth":"none","summary":"An unauthorized attacker can elevate privileges over the network due to missing authentication for a critical function in Microsoft SharePoint Server.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"sharepoint_server","vendor":"microsoft"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:F/RL:O/RC:C","version":"3.1"},"cwes":[{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"}],"description":"Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-07-15","github_poc":2,"max_poc_stars":12,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-07-15T08:53:00Z","kind":"github_poc","ref":"https://github.com/sentinel-aidefense/CVE-2026-56164-EXP","stars":12,"title":"CVE-2026-56164 EOP Exploit"},{"date":"2026-08-06T13:30:07Z","kind":"github_poc","ref":"https://github.com/sam00/POC-CVE-2026-56164-exploit","stars":2,"title":"CVE-2026-56164 is a critical missing-authentication vulnerability affecting on-premises Microsoft SharePoint Server. It allows unauthenticated, remote attackers to elevate privileges over a network. "}],"tier":"exploited"},"has_fix":null,"headline":"Microsoft SharePoint Server Missing Authentication for Critical Function","id":"CVE-2026-56164","indexable":true,"kev":{"dateAdded":"2026-07-14","dueDate":"2026-07-17","knownRansomwareCampaignUse":"Unknown","product":"SharePoint Server","requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","vendorProject":"Microsoft","vulnerabilityName":"Microsoft SharePoint Server Missing Authentication for Critical Function Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":"microsoft:sharepoint_server","products":["microsoft:sharepoint_server"],"type":"missing_authorization","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Microsoft Account Remote Code Execution Vulnerability","id":"CVE-2026-56165"},"packages":[],"prev":{"headline":"Microsoft Azure Kubernetes Service Elevation of Privilege Vulnerability","id":"CVE-2026-56163"},"products":["Microsoft SharePoint Enterprise Server 2016","Microsoft SharePoint Server 2019","Microsoft SharePoint Server Subscription Edition"],"published":"2026-07-14","related":[{"cvss_score":9.8,"headline":"Microsoft SharePoint Deserialization of Untrusted Data Vulnerability","id":"CVE-2026-50522","kev_date_added":"2026-07-22","published":"2026-07-14"},{"cvss_score":9.8,"headline":"Microsoft SharePoint Deserialization of Untrusted Data","id":"CVE-2026-58644","kev_date_added":"2026-07-16","published":"2026-07-14"},{"cvss_score":9.8,"headline":"Microsoft SharePoint Deserialization of Untrusted Data","id":"CVE-2026-20963","kev_date_added":"2026-03-18","published":"2026-01-13"},{"cvss_score":9.8,"headline":"Microsoft SharePoint Deserialization of Untrusted Data","id":"CVE-2025-53770","kev_date_added":"2025-07-20","published":"2025-07-20"},{"cvss_score":9.8,"headline":"Microsoft SharePoint Server Privilege Escalation","id":"CVE-2023-29357","kev_date_added":"2024-01-10","published":"2023-06-13"},{"cvss_score":9.1,"headline":"Microsoft SharePoint Weak Authentication","id":"CVE-2026-55040","kev_date_added":"2026-08-18","published":"2026-07-14"},{"cvss_score":8.8,"headline":"Microsoft SharePoint Code Injection","id":"CVE-2026-65660","kev_date_added":"2026-09-25","published":"2026-08-11"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"active","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-28","vendors":["Microsoft"]},"summary":"An unauthorized attacker can elevate privileges over the network due to missing authentication for a critical function in Microsoft SharePoint Server.","url":"https://insights.sbomify.com/CVE-2026-56164/"}