{"id":"CVE-2025-3928","kind":"vulnerability","aliases":["CVE-2025-3928"],"related":[],"title":"Commvault Web Server has an unspecified vulnerability that can be exploited by a remote, authenticated attacker","description":"Commvault Web Server has an unspecified vulnerability that can be exploited by a remote, authenticated attacker. According to the Commvault advisory: \"Webservers can be compromised through bad actors creating and executing webshells.\" Fixed in version 11.36.46, 11.32.89, 11.28.141, and 11.20.217 for Windows and Linux platforms. This vulnerability was added to the CISA Known Exploited Vulnerabilities (KEV) Catalog on 2025-04-28.","summary":"Commvault Web Server has an unspecified flaw that lets a remote attacker with valid credentials create and run webshells on the server. CISA lists it as actively exploited in the wild.","severity":"high","cvss":8.8,"epss":null,"exploited":true,"exploited_at":"2025-04-28T00:00:00+00:00","products":[{"name":"Commvault Web Server","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"commvault","fixed":["11.20.217"],"affected":">= 11.20.0, < 11.20.217","ecosystem":"vendor"},{"name":"commvault","fixed":["11.28.141"],"affected":">= 11.28.0, < 11.28.141","ecosystem":"vendor"},{"name":"commvault","fixed":["11.32.89"],"affected":">= 11.32.0, < 11.32.89","ecosystem":"vendor"},{"name":"commvault","fixed":["11.36.46"],"affected":">= 11.36.0, < 11.36.46","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["commvault","exploited","self-hosted","vendor"],"not_affected_if":["no-commvault-web-server"],"how_to_check":null,"fix":"Apply the mitigations from Commvault's vendor instructions, as directed by CISA's required action; if mitigations are unavailable, discontinue use of the product.","status":"open","published_at":"2025-04-25T16:15:27+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:48:45+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-23T20:48:45Z","model":"claude-haiku-5-5","output":{"fix":"Apply the mitigations from Commvault's vendor instructions, as directed by CISA's required action; if mitigations are unavailable, discontinue use of the product.","reach":"network","summary":"Commvault Web Server has an unspecified flaw that lets a remote attacker with valid credentials create and run webshells on the server. CISA lists it as actively exploited in the wild.","category":"vendor","who_cares":["commvault","self-hosted"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker runs arbitrary code on the Commvault server via a planted webshell","analyst_note":"Find Commvault's advisory for CVE-2025-3928 to get affected versions, fixed builds and the exact mitigation steps; the sources here give none.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["no-commvault-web-server"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000423,"input_tokens":2517,"output_tokens":342,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-04':126C '-2025':18A,21A '-28':127C '-3928':19A,22A '11.20.217':106C '11.28.141':104C '11.32.89':103C '11.36.46':102C '2025':125C 'accord':83C 'activ':62B 'actor':94C 'add':115C 'advisori':87C 'attack':16A,47B,82C 'authent':15A,81C 'bad':93C 'catalog':123C 'cisa':58B,118C 'commvault':1A,23A,26A,27A,28A,29A,30B,36B,67C,86C 'compromis':91C 'creat':51B,95C 'credenti':50B 'cve':17A,20A 'execut':97C 'exploit':11A,31B,63B,77C,120C 'fix':99C 'flaw':42B 'host':34B 'kev':122C 'known':119C 'let':44B 'linux':110C 'list':59B 'platform':111C 'remot':14A,46B,80C 'run':53B 'self':33B 'self-host':32B 'server':3A,25A,38B,57B,69C 'unspecifi':6A,41B,72C 'valid':49B 'vendor':35B 'version':101C 'vulner':7A,73C,113C,121C 'web':2A,24A,37B,68C 'webserv':88C 'webshel':54B,98C 'wild':66B 'window':108C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2025-04-25T16:15:27+00:00","kev":{"dateAdded":"2025-04-28","dueDate":"2025-05-19","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"9119a7d8-5eab-497f-8521-727c672e3725","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2025-3928","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-3928","severity":null,"published_at":"2025-04-28T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T15:39:40+00:00","note":null},{"source":"nvd","external_id":"CVE-2025-3928","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-3928","severity":null,"published_at":"2025-04-25T16:15:27+00:00","modified_at":"2026-10-08T12:54:32+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"}