{"answers":{"affected":"It affects 2 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-21974 exists.","fix":"No fix has been published for CVE-2021-21974 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21974 is a high-severity memory corruption vulnerability in Vmware Cloud Foundation, published on 24 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-21974 and fix it if it is affected.\n\nWhat it is: CVE-2021-21974 is a high-severity memory corruption vulnerability in Vmware Cloud Foundation, published on 24 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-21974 exists.\n\nAffected product: Vmware Cloud Foundation. 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-2021-21974/ (Markdown: https://insights.sbomify.com/CVE-2021-21974/index.md)","id":"CVE-2021-21974","markdown":"https://insights.sbomify.com/CVE-2021-21974/index.md","name":"CVE-2021-21974","record":{"aliases":["GHSA-4mwc-fv8c-wp9f"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"VMware ESXi hypervisor","requires_auth":"none","summary":"A heap-overflow in OpenSLP allows remote code execution on ESXi hosts by attackers on the same network segment.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"vmware","cpe":[{"product":"cloud_foundation","vendor":"vmware"},{"product":"esxi","vendor":"vmware"}],"cvss":{"score":8.8,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"OpenSLP as used in ESXi (7.0 before ESXi70U1c-17325551, 6.7 before ESXi670-202102401-SG, 6.5 before ESXi650-202102101-SG) has a heap-overflow vulnerability. A malicious actor residing within the same network segment as ESXi who has access to port 427 may be able to trigger the heap-overflow issue in OpenSLP service resulting in remote code execution.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2021-05-25","github_poc":7,"max_poc_stars":188,"metasploit":0,"nuclei":0,"refs":[{"date":"2021-05-25T17:14:38Z","kind":"github_poc","ref":"https://github.com/Shadow0ps/CVE-2021-21974","stars":188,"title":"POC for CVE-2021-21974 VMWare ESXi RCE Exploit"},{"date":"2026-07-08T07:52:01Z","kind":"github_poc","ref":"https://github.com/Aiyakami/CVE-2021-21974","stars":6,"title":"自研针对ESXI 堆栈溢出的CVE-2021-21974 POC，只支持项目给出的的目标和环境，用于学习和研究"},{"date":"2023-02-04T21:23:20Z","kind":"github_poc","ref":"https://github.com/n2x4/Feb2023-CVE-2021-21974-OSINT","stars":2,"title":"Analysis of the ransom demands from Shodan results"},{"date":"2023-02-08T10:46:37Z","kind":"github_poc","ref":"https://github.com/CYBERTHREATANALYSIS/ESXi-Ransomware-Scanner-mi","stars":2,"title":"ESXi EZ - A custom scanner that takes list of IPs either in JSON, CSV or individually  and checks for infection CVE-2021-21974"},{"date":"2023-10-19T02:03:44Z","kind":"github_poc","ref":"https://github.com/hateme021202/cve-2021-21974","stars":0,"title":"Nmap NSE script for cve-2021-21974"},{"date":"2025-01-10T18:00:20Z","kind":"github_poc","ref":"https://github.com/mercylessghost/CVE-2021-21974","stars":0,"title":null},{"date":"2025-09-04T17:29:13Z","kind":"github_poc","ref":"https://github.com/abirasecurity/CVE-2021-21974_vuln_dectection","stars":0,"title":"CVE-2021-21974 Vulnerability Detection Tool Safe PoC that identifies vulnerable SLP implementations without exploitation"}],"tier":"weaponised"},"has_fix":null,"headline":"Memory corruption in VMware Cloud Foundation","id":"CVE-2021-21974","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"vmware:cloud_foundation","products":["vmware:cloud_foundation","vmware:esxi"],"type":"memory_corruption","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"VMware Server Side Request Forgery in vRealize Operations Manager API","id":"CVE-2021-21975"},"packages":[],"prev":{"headline":"VMware vCenter Server and Cloud Foundation Server Side Request Forgery (SSRF)","id":"CVE-2021-21973"},"products":["VMware Cloud Foundation","VMware ESXi"],"published":"2021-02-24","related":[{"cvss_score":9.8,"headline":"VMware vCenter Server Heap-Based Buffer Overflow","id":"CVE-2024-38812","kev_date_added":"2024-11-20","published":"2024-09-17"},{"cvss_score":9.8,"headline":"Broadcom VMware vCenter Server Out-of-bounds Write","id":"CVE-2024-37079","kev_date_added":"2026-01-23","published":"2024-06-18"},{"cvss_score":9.8,"headline":"VMware Workspace ONE Access and Identity Manager Server-Side Template Injection","id":"CVE-2022-22954","kev_date_added":"2022-04-14","published":"2022-04-11"},{"cvss_score":9.8,"headline":"VMware vCenter Server File Upload","id":"CVE-2021-22005","kev_date_added":"2021-11-03","published":"2021-09-23"},{"cvss_score":9.8,"headline":"VMware vCenter Server Improper Input Validation","id":"CVE-2021-21985","kev_date_added":"2021-11-03","published":"2021-05-26"},{"cvss_score":9.8,"headline":"VMware Server Side Request Forgery in vRealize Operations Manager API","id":"CVE-2021-21975","kev_date_added":"2022-01-18","published":"2021-03-31"},{"cvss_score":9.8,"headline":"VMware vCenter Server Remote Code Execution","id":"CVE-2021-21972","kev_date_added":"2021-11-03","published":"2021-02-24"}],"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":"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":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-02","vendors":["n/a"]},"summary":"A heap-overflow in OpenSLP allows remote code execution on ESXi hosts by attackers on the same network segment.","url":"https://insights.sbomify.com/CVE-2021-21974/"}