{"id":"CVE-2026-20262","kind":"vulnerability","aliases":["CVE-2026-20262"],"related":[],"title":"A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an…","description":"A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system.\r\n\r\nThis vulnerability exists because the affected software does not properly validate user-supplied input during a file upload process. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected API endpoint of the affected system. A successful exploit could allow the attacker to create or overwrite any file on the underlying operating system. This file could later be used to elevate to root. To exploit this vulnerability, the attacker must have valid credentials with at least a lower-privileged, single-task user account.","summary":"Cisco Catalyst SD-WAN Manager has a path traversal flaw that lets an authenticated remote attacker create or overwrite any file on the system. CISA lists it as actively exploited in the wild.","severity":"critical","cvss":6.5,"epss":null,"exploited":true,"exploited_at":"2026-06-15T00:00:00+00:00","products":[{"name":"cisco catalyst sd-wan manager","fixed":["20.9.9.2"],"affected":"< 20.9.9.2","ecosystem":"vendor"},{"name":"cisco catalyst sd-wan manager","fixed":["20.12.7.2"],"affected":">= 20.10, < 20.12.7.2","ecosystem":"vendor"},{"name":"cisco catalyst sd-wan manager","fixed":["20.15.4.5"],"affected":">= 20.13, < 20.15.4.5","ecosystem":"vendor"},{"name":"cisco catalyst sd-wan manager","fixed":["20.15.5.3"],"affected":">= 20.15.5, < 20.15.5.3","ecosystem":"vendor"},{"name":"cisco catalyst sd-wan manager","fixed":["20.18.3.1"],"affected":">= 20.16, < 20.18.3.1","ecosystem":"vendor"},{"name":"cisco catalyst sd-wan manager","fixed":["26.1.1.2"],"affected":">= 26.1, < 26.1.1.2","ecosystem":"vendor"},{"name":"Cisco Catalyst SD-WAN Manager","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["catalyst-sd-wan-manager","cisco","exploited","sd-wan","self-hosted","vendor"],"not_affected_if":["managed-hosting","no-sd-wan-manager-deployed"],"how_to_check":null,"fix":"Apply the mitigations and patches in Cisco's advisory for CVE-2026-20262, following CISA BOD 26-04 guidance. If mitigations are unavailable, discontinue use of the product per CISA's required action.","status":"open","published_at":"2026-06-15T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:33:53+00:00","updated_at":"2026-10-24T00:09:50+00:00","category":"vendor","confidence":0.7,"triage":{"at":"2026-10-23T20:33:53Z","model":"claude-haiku-5-5","output":{"fix":"Apply the mitigations and patches in Cisco's advisory for CVE-2026-20262, following CISA BOD 26-04 guidance. If mitigations are unavailable, discontinue use of the product per CISA's required action.","summary":"Cisco Catalyst SD-WAN Manager has a path traversal flaw that lets an authenticated remote attacker create or overwrite any file on the system. CISA lists it as actively exploited in the wild.","category":"vendor","who_cares":["cisco","sd-wan","catalyst-sd-wan-manager","self-hosted"],"confidence":0.7,"analyst_note":"Find Cisco's security advisory for CVE-2026-20262 to get affected and fixed versions and any workaround, since the sources here list none.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["managed-hosting","no-sd-wan-manager-deployed"],"severity_if_unknown":"critical"},"cost_usd":0.00039,"input_tokens":2242,"output_tokens":331,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':22A,25A '-20262':23A,26A 'account':246C 'activ':112B 'affect':154C,161C,190C,195C 'allow':20A,136C,201C 'api':191C 'attack':99B,140C,177C,203C,230C 'authent':97B,138C 'catalyst':9A,28A,34A,40A,46A,52A,58A,64A,70B,84B,125C 'catalyst-sd-wan-manag':69B 'cisa':108B 'cisco':8A,27A,33A,39A,45A,51A,57A,63A,74B,83B,124C 'could':19A,135C,178C,200C,217C 'craft':185C 'creat':100B,142C,205C 'credenti':234C 'cve':21A,24A 'elev':222C 'endpoint':192C 'exist':158C 'exploit':75B,113B,179C,199C,226C 'file':104B,144C,148C,173C,209C,216C 'filesystem':151C 'flaw':93B 'former':14A,130C 'host':81B 'http':186C 'input':170C 'later':218C 'least':237C 'let':95B 'list':109B 'lower':240C 'lower-privileg':239C 'manag':13A,73B,88B,129C 'manager':32A,38A,44A,50A,56A,62A,68A 'must':231C 'oper':213C 'overwrit':102B,146C,207C 'path':91B 'privileg':241C 'process':175C 'proper':165C 'remot':98B,139C 'request':187C 'root':224C 'sd':11A,16A,30A,36A,42A,48A,54A,60A,66A,71B,77B,86B,127C,132C 'sd-wan':10A,15A,29A,35A,41A,47A,53A,59A,65A,76B,85B,126C,131C 'self':80B 'self-host':79B 'send':183C 'singl':243C 'single-task':242C 'softwar':162C 'success':198C 'suppli':169C 'system':107B,155C,196C,214C 'task':244C 'travers':92B 'ui':6A,122C 'under':212C 'upload':174C 'use':220C 'user':168C,245C 'user-suppli':167C 'valid':166C,233C 'vendor':82B 'vmanag':18A,134C 'vulner':2A,118C,157C,181C,228C 'wan':12A,17A,31A,37A,43A,49A,55A,61A,67A,72B,78B,87B,128C,133C 'web':5A,121C 'wild':116B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-06-15T00:00:00+00:00","kev":{"dateAdded":"2026-06-15","dueDate":"2026-06-29","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:L/UI:N/S:U/C:N/I:H/A:N","cvss_by":"psirt@cisco.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2026-20262","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-20262","severity":null,"published_at":"2026-06-15T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T15:39:39+00:00","note":null},{"source":"nvd","external_id":"CVE-2026-20262","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20262","severity":null,"published_at":"2026-06-15T18:16:34+00:00","modified_at":"2026-07-24T19:10:00+00:00","first_seen_at":"2026-10-23T23:44:51+00:00","fetched_at":"2026-10-23T23:44:51+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"}