{"answers":{"affected":"It affects 1 product.","exploited":"Yes. Attackers have exploited CVE-2025-53770 in the wild since at least 20 Jul 2025, including in ransomware campaigns.","fix":"No fix has been published for CVE-2025-53770 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 21 Jul 2025.","what":"CVE-2025-53770 is a critical unsafe deserialization vulnerability in Microsoft Sharepoint Server, published on 20 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-53770 and fix it if it is affected.\n\nWhat it is: CVE-2025-53770 is a critical unsafe deserialization vulnerability in Microsoft Sharepoint Server, published on 20 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2025-53770 in the wild since at least 20 Jul 2025, including in ransomware campaigns.\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-2025-53770/ (Markdown: https://insights.sbomify.com/CVE-2025-53770/index.md)","id":"CVE-2025-53770","markdown":"https://insights.sbomify.com/CVE-2025-53770/index.md","name":"CVE-2025-53770","record":{"aliases":["GHSA-xcrc-8vqv-vc8r"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"SharePoint Server","requires_auth":"none","summary":"Unauthorized attackers can execute code remotely via deserialization in Microsoft SharePoint Server, requiring immediate mitigation and patching.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"sharepoint_server","vendor":"microsoft"}],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:W/RC:C","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network.\nMicrosoft is aware that an exploit for CVE-2025-53770 exists in the wild.\nMicrosoft is preparing and fully testing a comprehensive update to address this vulnerability.  In the meantime, please make sure that the mitigation provided in this CVE documentation is in place so that you are protected from exploitation.","ecosystems":[],"exploits":{"exploitdb":1,"first_seen":"2025-07-08","github_poc":45,"max_poc_stars":315,"metasploit":1,"nuclei":1,"refs":[{"date":"2025-07-21T13:48:37Z","kind":"github_poc","ref":"https://github.com/soltanali0/CVE-2025-53770-Exploit","stars":315,"title":"SharePoint WebPart Injection Exploit Tool"},{"date":"2025-07-22T19:20:23Z","kind":"github_poc","ref":"https://github.com/MuhammadWaseem29/CVE-2025-53770","stars":57,"title":"Unauthenticated Remote Code Execution via unsafe deserialization in Microsoft SharePoint Server (CVE-2025-53770)"},{"date":"2025-07-21T14:19:50Z","kind":"github_poc","ref":"https://github.com/hazcod/CVE-2025-53770","stars":45,"title":"Scanner for the SharePoint CVE-2025-53770 RCE zero day vulnerability."},{"date":"2025-07-21T06:39:21Z","kind":"github_poc","ref":"https://github.com/kaizensecurity/CVE-2025-53770","stars":44,"title":"POC"},{"date":"2025-07-21T16:16:57Z","kind":"github_poc","ref":"https://github.com/ZephrFish/CVE-2025-53770-Scanner","stars":18,"title":"ToolShell scanner - CVE-2025-53770 and detection information"},{"date":"2025-07-27T20:55:09Z","kind":"github_poc","ref":"https://github.com/3a7/CVE-2025-53770","stars":14,"title":"CVE-2025-53770 Mass Scanner"},{"date":"2025-07-22T09:32:14Z","kind":"github_poc","ref":"https://github.com/AdityaBhatt3010/CVE-2025-53770-SharePoint-Zero-Day-Variant-Exploited-for-Full-RCE","stars":11,"title":"A critical zero-auth RCE vulnerability in SharePoint (CVE-2025-53770), now exploited in the wild, building directly on the spoofing flaw CVE-2025-49706."},{"date":"2025-07-23T21:02:14Z","kind":"github_poc","ref":"https://github.com/exfil0/CVE-2025-53770","stars":5,"title":"A sophisticated, wizard-driven Python exploit tool targeting CVE-2025-53770, a critical (CVSS 9.8) unauthenticated remote code execution (RCE) vulnerability in on-premises Microsoft SharePoint Server (2016, 2019, Subscription Edition)"}],"tier":"exploited"},"has_fix":null,"headline":"Microsoft SharePoint Deserialization of Untrusted Data","id":"CVE-2025-53770","indexable":true,"kev":{"dateAdded":"2025-07-20","dueDate":"2025-07-21","knownRansomwareCampaignUse":"Known","product":"SharePoint","requiredAction":"Disconnect public-facing versions of SharePoint Server that have reached their end-of-life (EOL) or end-of-service (EOS) to include SharePoint Server 2013 and earlier versions. For supported versions, please follow the mitigations according to CISA (URL listed below in Notes) and vendor instructions (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.","vendorProject":"Microsoft","vulnerabilityName":"Microsoft SharePoint Deserialization of Untrusted Data Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":"microsoft:sharepoint_server","products":["microsoft:sharepoint_server"],"type":"deserialization","year":"2025"},"n_packages":0,"n_references":1,"next":{"headline":"Microsoft SharePoint Server Spoofing Vulnerability","id":"CVE-2025-53771"},"packages":[],"prev":{"headline":"Windows Security App Spoofing Vulnerability","id":"CVE-2025-53769"},"products":["Microsoft SharePoint Enterprise Server 2016","Microsoft SharePoint Server 2019","Microsoft SharePoint Server Subscription Edition"],"published":"2025-07-20","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 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":"total"},"state":"PUBLISHED","updated":"2026-08-04","vendors":["Microsoft"]},"summary":"Unauthorized attackers can execute code remotely via deserialization in Microsoft SharePoint Server, requiring immediate mitigation and patching.","url":"https://insights.sbomify.com/CVE-2025-53770/"}