{"id":"CVE-2023-34048","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-34048","generatedAt":"2026-10-31T10:24:09.963Z","title":"VMware vCenter Server Out-of-Bounds Write Vulnerability","description":"vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol. A malicious actor with network access to vCenter Server may trigger an out-of-bounds write potentially leading to remote code execution.","published":"2023-10-25T18:17:28.000Z","lastModified":"2026-06-17T06:02:48.000Z","status":"Analyzed","sourceIdentifier":"security@vmware.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-787"],"affected":["vmware/vcenter server"],"epss":{"score":0.99234,"percentile":0.99936,"date":"2026-10-30","history":[]},"kev":{"listed":true,"dateAdded":"2024-01-22","dueDate":"2024-02-12","knownRansomwareCampaignUse":"Unknown","notes":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.\nhttps://www.vmware.com/security/advisories/VMSA-2023-0023.html;  https://nvd.nist.gov/vuln/detail/CVE-2023-34048"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 12 February 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"https://www.vmware.com/security/advisories/VMSA-2023-0023.html","tags":["Vendor Advisory"],"source":"security@vmware.com"},{"url":"https://www.vicarius.io/vsociety/posts/understanding-cve-2023-34048-a-zero-day-out-of-bound-write-in-vcenter-server","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.vmware.com/security/advisories/VMSA-2023-0023.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-34048","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-34048","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}