{"id":"CVE-2023-34048","kind":"vulnerability","aliases":["CVE-2023-34048"],"related":[],"title":"vmware vcenter server: vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol","description":"VMware vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol that allows an attacker to conduct remote code execution.\n\nCISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","summary":"VMware vCenter Server has an out-of-bounds write in its DCERPC protocol implementation. A remote attacker can run code on the vCenter server.","severity":"critical","cvss":9.8,"epss":null,"exploited":true,"exploited_at":"2024-01-22T00:00:00+00:00","products":[{"name":"VMware vCenter Server","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"vmware vcenter server","fixed":[],"affected":">= 4.0, <= 5.5","ecosystem":"vendor"},{"name":"vmware vcenter server","fixed":[],"affected":"= 7.0","ecosystem":"vendor"},{"name":"vmware vcenter server","fixed":[],"affected":"= 8.0","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","self-hosted","vcenter","vmware"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply the vendor mitigation or patch per VMware's advisory; if no mitigation is available, discontinue use of the product (per CISA required action).","status":"open","published_at":"2023-10-25T18:17:27+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T21:02:26+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:02:26Z","model":"claude-haiku-5-5","output":{"fix":"Apply the vendor mitigation or patch per VMware's advisory; if no mitigation is available, discontinue use of the product (per CISA required action).","reach":"network","impact":"high","summary":"VMware vCenter Server has an out-of-bounds write in its DCERPC protocol implementation. A remote attacker can run code on the vCenter server.","category":"infrastructure","who_cares":["vmware","vcenter","self-hosted"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker runs code remotely on the vCenter Server host","analyst_note":"Sources give no affected or fixed versions and no check method; pull the VMware advisory for CVE-2023-34048 to fill in versions, mitigation steps, and whether DCERPC is reachable by default.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000456,"input_tokens":2822,"output_tokens":347,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2023':22A,25A '-34048':23A,26A 'action':100C 'allow':90C 'appli':101C 'attack':63B,92C 'bound':11A,54B,79C 'cisa':98C 'code':66B,96C 'conduct':94C 'contain':6A,74C 'cve':21A,24A 'dcerpc':19A,58B,87C 'discontinu':107C 'execut':97C 'exploit':39B 'host':43B 'implement':16A,60B,84C 'infrastructur':40B 'instruct':105C 'mitig':102C,113C 'out-of-bound':8A,51B,76C 'per':103C 'product':111C 'protocol':20A,59B,88C 'remot':62B,95C 'requir':99C 'run':65B 'self':42B 'self-host':41B 'server':3A,5A,29A,32A,35A,38A,48B,70B,73C 'unavail':115C 'use':108C 'vcenter':2A,4A,28A,31A,34A,37A,44B,47B,69B,72C 'vendor':104C 'vmware':1A,27A,30A,33A,36A,45B,46B,71C 'vulner':13A,81C 'write':12A,55B,80C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-10-25T18:17:27+00:00","kev":{"dateAdded":"2024-01-22","dueDate":"2024-02-12","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"security@vmware.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2023-34048","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-34048","severity":null,"published_at":"2024-01-22T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T12:39:23+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-34048","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-34048","severity":null,"published_at":"2023-10-25T18:17:27+00:00","modified_at":"2026-06-17T06:02:47+00:00","first_seen_at":"2026-10-23T22:29:05+00:00","fetched_at":"2026-10-23T22:29:05+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}