{"id":"CVE-2026-104935","kind":"vulnerability","aliases":["CVE-2026-104935"],"related":[],"title":"ivanti connect secure: Authentication bypass by spoofing in ICS before version 25.1.3.0 allows a remote unauthenticated attacker to execute…","description":"Ivanti Connect Secure contains an authentication bypass by spoofing vulnerability that allows a remote unauthenticated attacker to execute arbitrary commands.\n\nCISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","summary":"Ivanti Connect Secure has an authentication bypass by spoofing flaw that lets a remote unauthenticated attacker run arbitrary commands on the appliance. CISA lists it as actively exploited in the wild.","severity":"critical","cvss":8.6,"epss":null,"exploited":true,"exploited_at":"2026-10-13T00:00:00+00:00","products":[{"name":"ivanti connect secure","fixed":["25.1.1.2"],"affected":">= 25.1.0.0, < 25.1.1.2","ecosystem":"vendor"},{"name":"ivanti connect secure","fixed":["25.1.3.0"],"affected":">= 25.1.2.0, < 25.1.3.0","ecosystem":"vendor"},{"name":"ivanti connect secure","fixed":[],"affected":"= 22.8","ecosystem":"vendor"},{"name":"Ivanti Connect Secure","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["connect-secure","exploited","ivanti","poc-public","self-hosted","vendor","vpn"],"not_affected_if":["managed-hosting"],"how_to_check":"Check the Connect Secure version in the admin console against the vendor advisory; the sources do not give affected version ranges.\nReview logs for unexpected administrative or command execution activity, per CISA's forensics triage requirements (linked in the KEV notes).","fix":"Apply the vendor mitigation or patch from Ivanti per CISA BOD 26-04; the sources do not name the fixed version.\nIf no mitigation is available, discontinue use of the product per CISA guidance.","status":"open","published_at":"2026-10-13T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:50+00:00","triaged_at":"2026-10-23T19:50:02+00:00","updated_at":"2026-10-24T00:09:50+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-23T19:50:02Z","model":"claude-haiku-5-5","output":{"fix":"Apply the vendor mitigation or patch from Ivanti per CISA BOD 26-04; the sources do not name the fixed version.\nIf no mitigation is available, discontinue use of the product per CISA guidance.","summary":"Ivanti Connect Secure has an authentication bypass by spoofing flaw that lets a remote unauthenticated attacker run arbitrary commands on the appliance. CISA lists it as actively exploited in the wild.","category":"vendor","who_cares":["ivanti","connect-secure","self-hosted","vpn"],"confidence":0.6,"analyst_note":"Find the Ivanti advisory for CVE-2026-104935 for affected and fixed versions, and the vendor mitigation steps; the KEV entry at cisa.gov does not give them.","how_to_check":"Check the Connect Secure version in the admin console against the vendor advisory; the sources do not give affected version ranges.\nReview logs for unexpected administrative or command execution activity, per CISA's forensics triage requirements (linked in the KEV notes).\nunknown","needs_analyst":true,"not_affected_if":["managed-hosting"],"severity_if_unknown":"critical"},"cost_usd":0.000428,"input_tokens":2234,"output_tokens":409,"severity_before":"critical"},"analyst_status":null,"analyst_note":null,"search":"'-04':119C,145C,176C '-104935':22A,25A '-2026':21A,24A '25.1.3.0':12A '26':118C,144C,175C 'accord':108C 'action':104C 'activ':77B 'adher':172C 'allow':13A,93C 'appli':105C 'applianc':72B 'applic':142C 'arbitrari':68B,100C 'asset':166C 'attack':17A,66B,97C 'authent':4A,56B,87C 'base':123C 'bod':117C,143C,174C 'bypass':5A,57B,88C 'cisa':73B,102C,115C,132C 'cloud':148C 'command':69B,101C 'complianc':113C 'connect':2A,27A,30A,33A,36A,39B,52B,83C 'connect-secur':38B 'contain':85C 'cve':20A,23A 'discontinu':151C 'ensur':112C,171C 'evalu':164C 'execut':19A,99C 'exploit':41B,78B 'exposur':169C 'flaw':60B 'follow':141C 'forens':134C 'guidanc':130C,146C 'guidelin':178C 'host':48B 'ic':9A 'instruct':111C 'internet':168C 'ivanti':1A,26A,29A,32A,35A,42B,51B,82C 'let':62B 'list':74B 'mitig':106C,157C 'note':129C,140C 'patch':177C 'poc':44B 'poc-publ':43B 'priorit':120C 'product':155C 'public':45B 'remot':15A,64B,95C 'requir':103C,136C 'respons':162C 'risk':125C 'run':67B 'secur':3A,40B,53B,84C,121C 'secure':28A,31A,34A,37A 'see':126C,137C 'self':47B 'self-host':46B 'servic':149C 'spoof':7A,59B,90C 'stakehold':160C 'triag':135C 'unauthent':16A,65B,96C 'unavail':159C 'updat':122C 'url':127C,138C 'use':152C 'vendor':49B,110C 'version':11A 'vpn':50B 'vulner':91C 'wild':81B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-13T00:00:00+00:00","kev":{"dateAdded":"2026-10-13","dueDate":"2026-10-16","requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L","cvss_by":"3c1d8aa1-5a33-4ea4-8992-aadd6440af75","poc_count":1,"sources":[{"source":"kev","external_id":"CVE-2026-104935","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-104935","severity":null,"published_at":"2026-10-13T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:50+00:00","fetched_at":"2026-10-25T16:39:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2026-104935","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-104935","severity":null,"published_at":"2026-10-13T16:17:11+00:00","modified_at":"2026-10-13T19:24:36+00:00","first_seen_at":"2026-10-23T23:44:52+00:00","fetched_at":"2026-10-23T23:44:52+00:00","note":null},{"source":"github-poc","external_id":"CompleteTech-LLC/ivanti-connect-secure-cve-2026-104935-check","url":"https://github.com/CompleteTech-LLC/ivanti-connect-secure-cve-2026-104935-check","severity":null,"published_at":"2026-10-23T23:42:43+00:00","modified_at":null,"first_seen_at":"2026-10-23T23:55:02+00:00","fetched_at":"2026-10-23T23:55:02+00:00","note":null}],"documents":[{"id":2251,"url":"https://github.com/CompleteTech-LLC/ivanti-connect-secure-cve-2026-104935-check","title":"CompleteTech-LLC/ivanti-connect-secure-cve-2026-104935-check","kind":"poc","source":"github","text":"Standalone defensive checker project for CVE-2026-104935: Ivanti Connect Secure: Authentication bypass by spoofing. One exploit per repository; implementation pending.\n\nstars 0","published_at":"2026-10-23T23:42:43+00:00","relation":"poc","confidence":null,"note":"0 stars"}],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}